Heisto MCP Tools

Heisto exposes 5 tools. Each one has its own page with the configuration for every client that can run this server.

guard_check

guard check
arena_config

arena config
list_sentinels Read-only

list sentinels
get_sentinel Read-only

get sentinel
recent_attempts

recent attempts

This list was read from the server itself, by connecting to it and calling tools/list on 14 November 2026. It is what the server actually exposes, not what its listing claims.

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.

Heisto MCP server