This record as markdown: /tools/7gugu-whistle-mcp/getvalue.md
What getValue does on Whistle
AI agents call getValue to retrieve information from Whistle without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why getValue is rated Low
This tool queries and retrieves data from the Whistle proxy server without modifying, deleting, or executing operations. It is a straightforward read operation that fetches configuration values by name. The blast radius is minimal as it only returns information that already exists.
From the tool's definition Tool name 'getValue' and description '根据名称获取单个值的完整信息（包含 data 字段）' (retrieve complete information of a single value by name, including data field) indicates a retrieval operation with no side effects.
Attacks that exploit this kind of access
The rule that runs getValue safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Whistle, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For getValue, this is the rule to start with:
getValue is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Whistle, apply this rule, and every getValue call is checked against it from then on.
Questions about getValue
根据名称获取单个值的完整信息（包含 data 字段）. It is categorised as a Read tool in the Whistle MCP Server, which means it retrieves data without modifying state.
Register the Whistle MCP server in PolicyLayer and add a rule for getValue: 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 Whistle. Nothing to install.
getValue 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 getValue 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 getValue. 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.
getValue is provided by the Whistle MCP server (7gugu/whistle-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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