List all capability categories available in the marketplace.
AI agents call get_capabilities to retrieve information from nullpath MCP Client without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and lists static, publicly available metadata about capability categories. It performs no modifications, deletions, executions, or financial operations. The blast radius of misuse is minimal—an agent could only enumerate existing categories, which is informational data already exposed in the marketplace.
From the tool's definition Tool name is 'get_capabilities' and description states it 'List all capability categories available in the marketplace' — a pure query operation with no side effects.
Attacks that exploit this kind of access
List all capability categories available in the marketplace. It is categorised as a Read tool in the nullpath MCP Client MCP Server, which means it retrieves data without modifying state.
Register the nullpath MCP Client MCP server in PolicyLayer and add a rule for get_capabilities: 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 nullpath MCP Client. Nothing to install.
get_capabilities 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 get_capabilities 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 get_capabilities. 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.
get_capabilities is provided by the nullpath MCP Client MCP server (nullpath-labs/mcp-client). 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.
Teams ship this data inside their own products. See what a licence covers →