Lists all WebMCP tools the page exposes.
AI agents call list_webmcp_tools to retrieve information from Opera DevTools MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a read-only operation that discovers and returns metadata about tools exposed by a web page. It has no side effects, does not execute code, and does not modify any data. The blast radius of misuse is minimal—an agent could learn what tools are available, but cannot perform actions with them through this tool alone. Typical read operations like 'list' fall into the Read category.
From the tool's definition Tool name 'list_webmcp_tools' and description 'Lists all WebMCP tools the page exposes' indicate a query/enumeration operation that retrieves information about available tools without modifying state or triggering external operations.
Attacks that exploit this kind of access
Lists all WebMCP tools the page exposes. It is categorised as a Read tool in the Opera DevTools MCP MCP Server, which means it retrieves data without modifying state.
Register the Opera DevTools MCP server in PolicyLayer and add a rule for list_webmcp_tools: 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 Opera DevTools MCP. Nothing to install.
list_webmcp_tools 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_webmcp_tools 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_webmcp_tools. 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_webmcp_tools is provided by the Opera DevTools MCP server (operasoftware/opera-devtools-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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