Get a value from the store by key.
AI agents call get_value to retrieve information from Simple MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves data from an in-memory key-value store without modifying, deleting, or executing any operations. This is a straightforward read operation. Severity is low because the blast radius of misuse is limited to information disclosure of values already stored in the system.
From the tool's definition Tool name is 'get_value' and description states 'Get a value from the store by key.' This is a retrieval operation with no side effects.
Attacks that exploit this kind of access
Get a value from the store by key. It is categorised as a Read tool in the Simple MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Simple MCP Server MCP server in PolicyLayer and add a rule for get_value: 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 Server. Nothing to install.
get_value 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_value 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_value. 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_value is provided by the Simple MCP Server MCP server (jmgress/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.
Teams ship this data inside their own products. See what a licence covers →