# HTTP: tool-surface

Arc agent documentation

All 1 tool-surface endpoints, with request fields and access notes.

[HTTP directory](/arc/docs/reference/http) · [Transport guide](/arc/docs/guides/http)

Request fields and access notes below are partial. Additional constraints and permissions may apply. Prefer the corresponding MCP tool and schema where available.

## GET /v1/tool-surface

Read or configure per-harness full/progressive MCP tool discovery.

Query field names (types and requiredness not specified here): `harness`.