Execution Profile

A tool_execution_profile describes how a tool is run.

Execution kinds

Initial execution kinds:

• mcp_server
• http_api
• native_app
• local_process
• shell
• browser
• model_service
• peer_agent
• embedded_runtime
• hybrid

Capabilities

Profiles SHOULD state support for:

• streaming progress
• cancellation
• timeout
• resume
• retries
• partial results
• background tasks
• result persistence
• artifacts
• sandboxing
• credential delegation
• offline execution
• context modifiers

If a capability is unsupported, say so explicitly. Silent fallback creates unsafe agent behavior.

Shell and local process profiles

Shell-like tools SHOULD declare command parsing strategy, working directory policy, environment policy, sandbox profile, background execution support, timeout behavior, exit-code interpretation, and classifier input.

Remote profiles

Remote tools SHOULD preserve native request ids, session ids, protocol versions, server names, retry semantics, and protocol-level error distinctions.