Returns the Phone Number of the MCP server Owner.
AI agents call validate to retrieve information from MCP Math Calculator Server 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 existing data (a phone number) without modifying, executing, or destroying anything. It is a straightforward Read operation. Severity is low because exposure of a server owner's phone number, while a privacy concern, does not enable system compromise or data manipulation directly.
From the tool's definition Tool description states it 'Returns the Phone Number of the MCP server Owner' — a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
Returns the Phone Number of the MCP server Owner. It is categorised as a Read tool in the MCP Math Calculator Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Math Calculator Server MCP server in PolicyLayer and add a rule for validate: 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 Math Calculator Server. Nothing to install.
validate 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 validate 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 validate. 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.
validate is provided by the MCP Math Calculator Server MCP server (r-yash/mcpserver). 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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