AI agents call search_item_ids to retrieve information from RSS MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs a search query to retrieve item IDs matching search criteria. This is a read-only operation with no side effects—it does not create, modify, delete, or execute anything. The minimal blast radius from misuse would be exposure of matching item IDs, which are metadata already accessible within the RSS reader. No destructive, financial, or code execution risk is present.
From the tool's definition Tool name is 'search_item_ids' and description states it 'Searches for item IDs that match a given term.' This is a query operation that retrieves matching identifiers without modifying, deleting, or executing external operations.
Documented attack patterns abuse exactly the kind of access search_item_ids gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and RSS MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for search_item_ids:
{
"version": "1",
"default": "deny",
"tools": {
"search_item_ids": {}
}
} search_item_ids is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Searches for item IDs that match a given term. It is categorised as a Read tool in the RSS MCP Server MCP Server, which means it retrieves data without modifying state.
Register the RSS MCP Server MCP server in PolicyLayer and add a rule for search_item_ids: 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 RSS MCP Server. Nothing to install.
search_item_ids 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 search_item_ids 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 search_item_ids. 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.
search_item_ids is provided by the RSS MCP Server MCP server (xueli-sherryli/rss-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from RSS 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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34 RSS MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.