List web platform features filtered by their Baseline status. Use this to discover which features are Widely Available, Newly Available, or not yet Baseline. Args: - status (string, optional): Filter by
AI agents call compat_list_baseline to retrieve information from Web Compat 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 web platform compatibility data based on filter criteria. It performs no mutations, executions, or destructive operations—it only queries and returns information about feature compatibility status (Widely Available, Newly Available, or not yet Baseline). This is a classic read operation with minimal security risk.
From the tool's definition Tool name 'compat_list_baseline' and description 'List web platform features filtered by their Baseline status' indicates a retrieval/query operation.
Attacks that exploit this kind of access
List web platform features filtered by their Baseline status. Use this to discover which features are Widely Available, Newly Available, or not yet Baseline. Args: - status (string, optional): Filter by. It is categorised as a Read tool in the Web Compat MCP Server, which means it retrieves data without modifying state.
Register the Web Compat MCP server in PolicyLayer and add a rule for compat_list_baseline: 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 Web Compat. Nothing to install.
compat_list_baseline 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 compat_list_baseline 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 compat_list_baseline. 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.
compat_list_baseline is provided by the Web Compat MCP server (shuji-bonji/web-compat-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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