Retrieve persistent info from disk.
AI agents call get_persistent_info to retrieve information from Simple MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves stored information without modifying, deleting, or executing anything. It is a straightforward read operation that queries persisted data. No side effects are possible from retrieval alone. Severity is low because reading stored information poses minimal risk unless the data itself is highly sensitive, but the tool itself has no intrinsic destructive or dangerous capability.
From the tool's definition 'Retrieve persistent info from disk' - this is a data retrieval operation with no modification or execution capability.
Attacks that exploit this kind of access
Retrieve persistent info from disk. It is categorised as a Read tool in the Simple MCP MCP Server, which means it retrieves data without modifying state.
Register the Simple MCP server in PolicyLayer and add a rule for get_persistent_info: 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 Simple MCP. Nothing to install.
get_persistent_info 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_persistent_info 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_persistent_info. 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_persistent_info is provided by the Simple MCP server (karar-hayder/simple-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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