List all browsers tracked in MDN Browser Compat Data with their current versions and release dates. Args: - response_format (
AI agents call compat_list_browsers 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 only lists and retrieves existing browser compatibility metadata from MDN. It performs a straightforward data query with no capability to modify, delete, execute code, or trigger external operations. The output is informational only, making it a low-severity Read operation.
From the tool's definition Tool name 'compat_list_browsers' and description 'List all browsers tracked in MDN Browser Compat Data with their current versions and release dates' indicate a retrieval/query operation with no side effects.
Attacks that exploit this kind of access
List all browsers tracked in MDN Browser Compat Data with their current versions and release dates. Args: - response_format (. 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_browsers: 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_browsers 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_browsers 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_browsers. 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_browsers 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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