Group failures by similar error signature.
AI agents call cluster_failures to retrieve information from MCP Test Failure Analysis Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool reads and analyzes test failure data to cluster them by similarity. It has no side effects—it does not create, modify, delete, or execute operations. It is a pure analysis/query function that returns grouped results based on input failure logs or data, fitting the Read category.
From the tool's definition Tool 'cluster_failures' with description 'Group failures by similar error signature' performs analysis and grouping of existing failure data without modifying, deleting, or executing operations. The verb 'group' indicates data retrieval and categorization.
Attacks that exploit this kind of access
Group failures by similar error signature. It is categorised as a Read tool in the MCP Test Failure Analysis Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Test Failure Analysis Server MCP server in PolicyLayer and add a rule for cluster_failures: 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 MCP Test Failure Analysis Server. Nothing to install.
cluster_failures 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 cluster_failures 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 cluster_failures. 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.
cluster_failures is provided by the MCP Test Failure Analysis Server MCP server (rudrathkr/mcpservercreationpythonsdk). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
cluster_failures is one line of MCP Test Failure Analysis Server's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →