use serde::{Deserialize, Serialize};
use serde_json::Value;
const MAX_DECLARATION_BYTES: usize = 8 * 1024 * 1024;
const MAX_DESCRIPTION_CHARS: usize = 4000;
use super::validation::{paths, present, script, text, timeout};
#[derive(Debug, Clone, Serialize)]
#[serde(untagged)]
pub enum AgentTool {
Command(CommandTool),
Builtin(BuiltinTool),
}
impl<'de> Deserialize<'de> for AgentTool {
fn deserialize<D: serde::Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
use serde::de::Error;
let value = Value::deserialize(deserializer)?;
if value.get("builtin").is_some() {
serde_json::from_value(value).map(Self::Builtin)
} else {
serde_json::from_value(value).map(Self::Command)
}
.map_err(D::Error::custom)
}
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(
rename_all(serialize = "camelCase", deserialize = "snake_case"),
deny_unknown_fields
)]
pub struct CommandTool {
pub description: String,
#[serde(default = "empty_schema")]
pub input_schema: Value,
pub protocol: ToolProtocol,
pub command: String,
pub args: Vec<crate::scope::Argument>,
#[serde(
default,
deserialize_with = "timeout",
serialize_with = "super::validation::milliseconds::serialize",
skip_serializing_if = "Option::is_none"
)]
pub timeout_ms: Option<std::time::Duration>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub execution_paths: Vec<super::LogicalPath>,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
#[serde(rename_all = "lowercase")]
pub enum ToolProtocol {
Json,
Plain,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct BuiltinTool {
pub builtin: Builtin,
#[serde(
default,
deserialize_with = "present",
skip_serializing_if = "Option::is_none"
)]
pub args: Option<Vec<String>>,
#[serde(
default,
deserialize_with = "present",
skip_serializing_if = "Option::is_none"
)]
pub description: Option<String>,
}
pub use artifactize_tools::Builtin;
impl AgentTool {
pub(super) fn validate(&self) -> Result<(), String> {
if serde_json::to_vec(self).map_err(|e| e.to_string())?.len() > MAX_DECLARATION_BYTES {
return Err("Tool declaration exceeds 8 MiB.".into());
}
match self {
Self::Command(tool) => {
description(&tool.description)?;
script(&tool.command, &tool.args)?;
if tool.command.contains(['{', '}']) {
return Err("Tool command must not contain placeholders.".into());
}
paths(&tool.execution_paths, "execution_paths")?;
crate::tools::schema::compile(&tool.input_schema)?;
if tool.protocol == ToolProtocol::Plain {
for arg in &tool.args {
crate::tools::plain_argument(&arg.to_string(), |name| {
if tool.input_schema["properties"].get(name).is_none() {
return Err(format!("Unknown plain tool placeholder: {name}"));
}
Ok(String::new())
})?;
}
}
Ok(())
}
Self::Builtin(tool) => {
if let Some(value) = &tool.description {
description(value)?;
}
artifactize_tools::builtin::validate_args(
tool.builtin,
tool.args.as_deref(),
false,
)?;
if let Some(args) = &tool.args {
validate_agent_target(tool.builtin, args)?;
}
Ok(())
}
}
}
pub fn input_schema(&self) -> Value {
match self {
Self::Command(tool) => tool.input_schema.clone(),
Self::Builtin(tool) => match &tool.args {
Some(args) => crate::tools::builtin::fixed_schema(tool.builtin, args),
None => crate::tools::builtin::input_schema(tool.builtin),
},
}
}
}
#[derive(Debug, Clone, Serialize)]
#[serde(untagged)]
pub enum HumanTool {
Command(HumanCommandTool),
Builtin(HumanBuiltinTool),
}
impl<'de> Deserialize<'de> for HumanTool {
fn deserialize<D: serde::Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
use serde::de::Error;
let value = Value::deserialize(deserializer)?;
if value.get("builtin").is_some() {
serde_json::from_value(value).map(Self::Builtin)
} else {
serde_json::from_value(value).map(Self::Command)
}
.map_err(D::Error::custom)
}
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(
rename_all(serialize = "camelCase", deserialize = "snake_case"),
deny_unknown_fields
)]
pub struct HumanCommandTool {
pub description: String,
pub kind: HumanToolKind,
pub command: String,
#[serde(deserialize_with = "crate::scope::human_arguments")]
pub args: Vec<crate::scope::Argument>,
#[serde(
default,
deserialize_with = "timeout",
serialize_with = "super::validation::milliseconds::serialize",
skip_serializing_if = "Option::is_none"
)]
pub timeout_ms: Option<std::time::Duration>,
}
#[derive(Debug, Clone)]
pub struct HumanBuiltinTool {
pub builtin: Builtin,
pub description: String,
pub args: Vec<crate::scope::Argument>,
}
impl<'de> Deserialize<'de> for HumanBuiltinTool {
fn deserialize<D: serde::Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
use serde::de::Error;
#[derive(Deserialize)]
#[serde(deny_unknown_fields)]
struct Declaration {
builtin: Builtin,
#[serde(default, deserialize_with = "present")]
description: Option<String>,
#[serde(default, deserialize_with = "present")]
kind: Option<HumanToolKind>,
#[serde(deserialize_with = "crate::scope::human_arguments")]
args: Vec<crate::scope::Argument>,
}
let declaration = Declaration::deserialize(deserializer)?;
let args: Vec<String> = declaration.args.iter().map(ToString::to_string).collect();
artifactize_tools::builtin::validate_args(declaration.builtin, Some(&args), true)
.map_err(D::Error::custom)?;
let kind = if declaration.builtin == Builtin::Open {
HumanToolKind::Launch
} else {
HumanToolKind::Output
};
if declaration.kind.is_some_and(|declared| declared != kind) {
return Err(D::Error::custom(
"Human builtin kind disagrees with its tool.",
));
}
Ok(Self {
builtin: declaration.builtin,
description: declaration.description.unwrap_or_else(|| {
crate::tools::builtin::fixed_description(declaration.builtin, &args).into()
}),
args: declaration.args,
})
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
#[serde(rename_all = "lowercase")]
pub enum HumanToolKind {
Launch,
Output,
}
impl HumanTool {
pub fn description(&self) -> &str {
match self {
Self::Command(tool) => &tool.description,
Self::Builtin(tool) => &tool.description,
}
}
pub fn kind(&self) -> HumanToolKind {
match self {
Self::Command(tool) => tool.kind,
Self::Builtin(tool) => tool.kind(),
}
}
pub(super) fn validate(&self) -> Result<(), String> {
description(self.description())?;
match self {
Self::Command(tool) => {
script(&tool.command, &tool.args)?;
if tool.command.contains(['{', '}']) {
return Err("Tool command must not contain placeholders.".into());
}
for argument in &tool.args {
crate::scope::validate_human_argument(argument)
.map_err(|error| error.to_string())?;
}
}
Self::Builtin(tool) => {
for argument in &tool.args {
crate::scope::validate_human_argument(argument)
.map_err(|error| error.to_string())?;
}
if tool.builtin != Builtin::Help
&& let crate::scope::Argument::Literal(target) = &tool.args[0]
&& !(tool.builtin == Builtin::Open
&& artifactize_tools::builtin::is_url(target))
{
artifactize_tools::scope::logical_path(target)
.map_err(|error| error.to_string())?;
}
if tool.builtin == Builtin::Help
&& tool
.args
.iter()
.any(|arg| matches!(arg, crate::scope::Argument::Reference { .. }))
{
return Err(
"Help args are literal program/subcommand names, not path placeholders."
.into(),
);
}
}
}
Ok(())
}
}
fn validate_agent_target(builtin: Builtin, args: &[String]) -> Result<(), String> {
if builtin == Builtin::Help {
if args.iter().any(|arg| arg.contains(['{', '}'])) {
return Err("Help args are literal program/subcommand names.".into());
}
return Ok(());
}
artifactize_tools::scope::logical_path(&args[0]).map_err(|error| error.to_string())
}
fn empty_schema() -> Value {
serde_json::json!({"type":"object", "additionalProperties":false})
}
pub(super) fn description(value: &str) -> Result<(), String> {
text(value, "Tool description")?;
if value.encode_utf16().count() > MAX_DESCRIPTION_CHARS
|| value.replace("{artifactName}", "").contains(['{', '}'])
{
return Err(
"Tool description is limited to 4000 characters and supports only {artifactName}."
.into(),
);
}
Ok(())
}
impl HumanBuiltinTool {
pub fn kind(&self) -> HumanToolKind {
if self.builtin == Builtin::Open {
HumanToolKind::Launch
} else {
HumanToolKind::Output
}
}
}
impl Serialize for HumanBuiltinTool {
fn serialize<S: serde::Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
#[derive(Serialize)]
struct Stored<'a> {
builtin: Builtin,
description: &'a str,
kind: HumanToolKind,
args: &'a [crate::scope::Argument],
}
Stored {
builtin: self.builtin,
description: &self.description,
kind: self.kind(),
args: &self.args,
}
.serialize(serializer)
}
}