commands · Yamcs MCP Server MCP: Risk & Policy

WHAT IT DOES

What commands does on Yamcs MCP Server

AI agents call commands to retrieve information from Yamcs MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why commands needs a policy

With no description, classification is uncertain. The plural noun form 'commands' (vs. 'describe_command' for detail) strongly suggests this is a listing/enumeration tool that retrieves available commands. However, in a mission control context, a tool named 'commands' could potentially send commands.

From the tool's definition Tool name is 'commands' with an empty description. Sibling tool 'describe_command' suggests listing/querying commands.

Attacks that exploit this kind of access

Questions about commands

What does the commands tool do? +

commands. It is categorised as a Read tool in the Yamcs MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on commands? +

Register the Yamcs MCP Server MCP server in PolicyLayer and add a rule for commands: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Yamcs MCP Server. Nothing to install.

What risk level is commands? +

commands is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit commands? +

Yes. Add a rate_limit block to the commands rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block commands completely? +

Set action: deny in the PolicyLayer policy for commands. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides commands? +

commands is provided by the Yamcs MCP Server MCP server (paulmramirez/yamcs-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.