List available CSS analysis capabilities.
AI agents call list_capabilities to retrieve information from CSS MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool merely enumerates or retrieves information about available features without modifying, executing, or affecting any data or external systems. It is a purely informational Read operation with minimal risk if misused.
From the tool's definition Tool name 'list_capabilities' and description 'List available CSS analysis capabilities' indicate a query/retrieval operation with no side effects.
Attacks that exploit this kind of access
List available CSS analysis capabilities. It is categorised as a Read tool in the CSS MCP Server MCP Server, which means it retrieves data without modifying state.
Register the CSS MCP Server MCP server in PolicyLayer and add a rule for list_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 CSS MCP Server. Nothing to install.
list_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 list_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 list_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.
list_capabilities is provided by the CSS MCP Server MCP server (lesleslie/css-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.
Teams ship this data inside their own products. See what a licence covers →