microCMSについての質問に答える場合、まずこのツールを利用します。docs/general.md の内容を返します。これにはmicroCMS全体の概要や共通情報が書かれています。
AI agents call fetch_general to retrieve information from microCMS Document MCP 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 static documentation content without any write, execute, delete, or financial operations. It is a straightforward read operation that queries existing documentation. There are no side effects, no code execution, and no data modification. Severity is low because misuse would only result in retrieving incorrect information, with minimal blast radius.
From the tool's definition Tool name 'fetch_general' and description indicating it returns content from 'docs/general.md' — a retrieval operation with no modification. The Japanese description translates to: 'When answering questions about microCMS, use this tool first.
Documented attack patterns abuse exactly the kind of access fetch_general gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and microCMS Document MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for fetch_general:
{
"version": "1",
"default": "deny",
"tools": {
"fetch_general": {}
}
}fetch_general is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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microCMSについての質問に答える場合、まずこのツールを利用します。docs/general.md の内容を返します。これにはmicroCMS全体の概要や共通情報が書かれています。. It is categorised as a Read tool in the microCMS Document MCP Server MCP Server, which means it retrieves data without modifying state.
Register the microCMS Document MCP Server MCP server in PolicyLayer and add a rule for fetch_general: 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 microCMS Document MCP Server. Nothing to install.
fetch_general 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 fetch_general 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 fetch_general. 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.
fetch_general is provided by the microCMS Document MCP Server MCP server (microcmsio/microcms-document-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from microCMS Document MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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3 microCMS Document MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.