List all available ROS topics
AI agents call list_topics to retrieve information from Rosbridge MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs information discovery by listing ROS topics, which is a read-only operation with no side effects. It does not publish, subscribe, execute, or modify any system state. The blast radius of misuse is minimal—an attacker could only gain knowledge of available topics in the ROS system, which is typically non-sensitive metadata.
From the tool's definition Tool name 'list_topics' and description 'List all available ROS topics' indicate a query operation that retrieves information about available topics without modifying or executing any actions.
Attacks that exploit this kind of access
List all available ROS topics. It is categorised as a Read tool in the Rosbridge MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Rosbridge MCP Server MCP server in PolicyLayer and add a rule for list_topics: 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 Rosbridge MCP Server. Nothing to install.
list_topics is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_topics 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.
Set action: deny in the PolicyLayer policy for list_topics. 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.
list_topics is provided by the Rosbridge MCP Server MCP server (takanarishimbo/rosbridge-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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