Compare browser compatibility across multiple web platform features side by side. Useful for choosing between alternative APIs or understanding support differences. Args: - features (string[]): 2-5 BCD feature identifiers to compare (e.g., [
AI agents call compat_compare 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 queries browser compatibility data for comparison purposes. It has no side effects—it does not create, modify, delete, or execute anything. It purely reads compatibility information to help developers make informed decisions about API choices. This is a straightforward Read category tool.
From the tool's definition Tool description states it 'Compare[s] browser compatibility across multiple web platform features side by side' and is 'Useful for choosing between alternative APIs or understanding support differences.' The arguments accept feature identifiers for…
Attacks that exploit this kind of access
Compare browser compatibility across multiple web platform features side by side. Useful for choosing between alternative APIs or understanding support differences. Args: - features (string[]): 2-5 BCD feature identifiers to compare (e.g., [. 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_compare: 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_compare 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_compare 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_compare. 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_compare 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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