Struct McpServer 

pub struct McpServer {
    pub command: Option<Vec<String>>,
    pub url: Option<String>,
    pub env: BTreeMap<String, String>,
    pub env_from: Vec<String>,
}

One MCP server, as declared for an agent.

Exactly one of command and url must be given. They are separate optional fields rather than an untagged enum because deny_unknown_fields — which is what catches a typo like comand — cannot be combined with a flattened enum, and silently accepting a misspelt field would leave an agent without the server it thinks it has.

Fields

command: Option<Vec<String>>

Command and arguments, for a server spoken to over stdio.

url: Option<String>

Endpoint, for a server spoken to over HTTP.

env: BTreeMap<String, String>

Non-secret environment variables, set literally.

For values that are safe in a committed file: a cluster name, a region, a default database. Anything that authenticates belongs in McpServer::env_from.

env_from: Vec<String>

Names of variables forwarded from the Tower’s own environment.

The Tower reads these at spawn time and passes them through. The value never appears in layover.toml, so the file stays committable.

Implementations

impl McpServer

pub fn transport(&self) -> Result<McpTransport<'_>, McpError>

Returns how this server is reached.

Errors

Returns McpError when neither or both of command and url are set.

Trait Implementations

impl Clone for McpServer

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for McpServer

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for McpServer

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for McpServer

impl PartialEq for McpServer

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for McpServer