AI agents call get_dimensions_rubric to retrieve information from Eff without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and returns reference documentation (a rubric and definitions) without creating, modifying, deleting, or executing any operations. It is purely informational with no blast radius if misused by an AI agent.
From the tool's definition Tool name 'get_dimensions_rubric' and description 'Return the EFF rubric and dimension definitions' indicate a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
Return the EFF rubric and dimension definitions (eff://dimensions). It is categorised as a Read tool in the Eff MCP Server, which means it retrieves data without modifying state.
Register the Eff MCP server in PolicyLayer and add a rule for get_dimensions_rubric: 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 Eff. Nothing to install.
get_dimensions_rubric 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 get_dimensions_rubric 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 get_dimensions_rubric. 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.
get_dimensions_rubric is provided by the Eff MCP server (vs3kulic/eff-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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