Struct CallToolMessageAgent 

pub struct CallToolMessageAgent { /* private fields */ }

Agent that processes tool calls from LLM messages.

When an LLM response contains tool calls, this agent executes them and outputs the results as tool response messages. Consecutive calls to tools registered with ExecutionMode::Parallel run concurrently (bounded by max_concurrency); calls to Sequential tools — the default — run one at a time and act as barriers. Results are emitted in input order.

Configuration

• tools - Optional regex patterns to filter which tools can be called
• max_concurrency - Maximum number of Parallel-mode tool calls in flight at once; values below 1 are treated as 1 (default: 8)

Ports

• Input message - LLM message that may contain tool calls
• Output message - Tool response messages (one per tool call)

Implementations

impl CallToolMessageAgent

pub const DEF_NAME: &'static str = "modular_agent_core::tool::CallToolMessageAgent"

pub fn def_name() -> &'static str

pub fn agent_definition() -> AgentDefinition

pub fn register(ma: &ModularAgent)

Trait Implementations

impl AsAgent for CallToolMessageAgent

fn new( ma: ModularAgent, id: String, spec: AgentSpec, ) -> Result<Self, AgentError>

Constructs a new agent instance.

fn stop<'life0, 'async_trait>( &'life0 mut self, ) -> Pin<Box<dyn Future<Output = Result<(), AgentError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Called when the agent stops.

fn process<'life0, 'async_trait>( &'life0 mut self, ctx: AgentContext, _port: String, value: AgentValue, ) -> Pin<Box<dyn Future<Output = Result<(), AgentError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Processes an input message.

fn configs_changed(&mut self) -> Result<(), AgentError>

Called when configuration values change.

fn start<'life0, 'async_trait>( &'life0 mut self, ) -> Pin<Box<dyn Future<Output = Result<(), AgentError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Called when the agent starts.

impl HasAgentData for CallToolMessageAgent

fn data(&self) -> &AgentData

fn mut_data(&mut self) -> &mut AgentData