List all MCP servers currently configured in this environment.
AI agents call percept_installed to retrieve information from Perceptdot without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple read/query operation to discover or list configured MCP servers. It has no side effects, does not execute code, does not modify data, and does not delete anything. The blast radius of misuse is minimal—an agent could learn about available tools but cannot harm systems or data with this information alone. Classification as Read is appropriate.
From the tool's definition Tool name 'percept_installed' and description 'List all MCP servers currently configured in this environment' indicate a retrieval operation that queries the current state of installed servers without modifying or executing anything.
Attacks that exploit this kind of access
List all MCP servers currently configured in this environment. It is categorised as a Read tool in the Perceptdot MCP Server, which means it retrieves data without modifying state.
Register the Perceptdot MCP server in PolicyLayer and add a rule for percept_installed: 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 Perceptdot. Nothing to install.
percept_installed 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 percept_installed 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 percept_installed. 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.
percept_installed is provided by the Perceptdot MCP server (perceptdot/percept). 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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