AI agents call list_skills to retrieve information from Stac2026 without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays information about available skills without modifying, executing, or deleting any data. It is a straightforward read operation similar to 'list' or 'get' actions. The low severity reflects minimal risk even if an AI agent calls it unexpectedly—it only returns informational data about the skill catalog.
From the tool's definition Tool name 'list_skills' and description 'List all available skills with their names and descriptions' indicate a query/retrieval operation with no side effects.
Attacks that exploit this kind of access
List all available skills with their names and descriptions. It is categorised as a Read tool in the Stac2026 MCP Server, which means it retrieves data without modifying state.
Register the Stac2026 MCP server in PolicyLayer and add a rule for list_skills: 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 Stac2026. Nothing to install.
list_skills 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_skills 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_skills. 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_skills is provided by the Stac2026 MCP server (ktg-one/mcp). 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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