class MCProtocol::CallToolResult

• MCProtocol::CallToolResult
• Reference
• Object

Overview

The server's response to a tool call.

Any errors that originate from the tool SHOULD be reported inside the result object, with #isError set to true, not as an MCP protocol-level error response. Otherwise, the LLM would not be able to see that an error occurred and self-correct.

However, any errors in finding the tool, an error indicating that the server does not support tool calls, or any other exceptional conditions, should be reported as an MCP error response.

Included Modules

• JSON::Serializable

Defined in:

mcprotocol/call_tool_result.cr

Constructors

• .new(pull : JSON::PullParser)
• .new(content : Array(String), _meta : JSON::Any | Nil = Nil, isError : Bool | Nil = Nil)

Instance Method Summary

• #_meta : JSON::Any | Nil

  This result property is reserved by the protocol to allow clients and servers to attach additional metadata to their responses.

• #content : Array(String)
• #isError : Bool | Nil

  Whether the tool call ended in an error.

Constructor Detail

Instance Method Detail