AI agents call search-techniques to retrieve information from WCAG MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a search operation that retrieves and returns matching WCAG technique documentation. There are no side effects, data modifications, code execution, or irreversible actions. The blast radius of misuse is minimal—an agent could only retrieve inappropriate or irrelevant accessibility guidance documentation, which poses no security, financial, or operational risk.
From the tool's definition Tool 'search-techniques' searches techniques by keyword in titles. The description indicates retrieval/querying functionality with no modification or execution of external systems.
Documented attack patterns abuse exactly the kind of access search-techniques gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and WCAG MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for search-techniques:
{
"version": "1",
"default": "deny",
"tools": {
"search-techniques": {}
}
} search-techniques is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Searches techniques by keyword in titles. It is categorised as a Read tool in the WCAG MCP Server MCP Server, which means it retrieves data without modifying state.
Register the WCAG MCP Server MCP server in PolicyLayer and add a rule for search-techniques: 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 WCAG MCP Server. Nothing to install.
search-techniques 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 search-techniques 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 search-techniques. 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.
search-techniques is provided by the WCAG MCP Server MCP server (joe-watkins/wcag-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from WCAG MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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20 WCAG MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.