AI agents call get_resource_by_hash to retrieve information from Evernote MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The name 'get_resource_by_hash' indicates a query or fetch operation that retrieves data without modifying it. No side effects are implied. While the empty description reduces confidence somewhat, the 'get_' prefix is a strong indicator of a Read operation. Blast radius is low if misused—an agent could retrieve unintended resources but cannot modify or delete data through this tool alone.
From the tool's definition Tool name 'get_resource_by_hash' suggests retrieval of a resource by its hash identifier. The description is empty, but based on naming convention and the sibling tools on this server (which include read, write, and destructive operations), this appears to be…
Documented attack patterns abuse exactly the kind of access get_resource_by_hash gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Evernote MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_resource_by_hash:
{
"version": "1",
"default": "deny",
"tools": {
"get_resource_by_hash": {}
}
}get_resource_by_hash is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_resource_by_hash. It is categorised as a Read tool in the Evernote MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Evernote MCP Server MCP server in PolicyLayer and add a rule for get_resource_by_hash: 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 Evernote MCP Server. Nothing to install.
get_resource_by_hash 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_resource_by_hash 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_resource_by_hash. 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_resource_by_hash is provided by the Evernote MCP Server MCP server (kensou24/evernote-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Evernote 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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52 Evernote MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.