expand_search_query

THE RISK

Low Risk

Why expand_search_query needs a policy

This is a pure read operation that performs query expansion/transformation to improve downstream search effectiveness. It retrieves no data itself, modifies nothing, and has no side effects—it simply enhances natural language into searchable keywords.

From the tool's definition The tool description states it 'Expand[s] a natural language query into optimal search keywords' and is positioned as a preprocessing step ('Use this FIRST') before actual searches.

Documented attack patterns abuse exactly the kind of access expand_search_query gives an agent:

POLICY

How to control expand_search_query

PolicyLayer is an MCP gateway — it sits between your AI agents and Salesforce Documentation MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for expand_search_query:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "expand_search_query": {}
  }
}

expand_search_query is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Salesforce Documentation MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about expand_search_query

What does the expand_search_query tool do? +

🧠 LLM-POWERED: Expand a natural language query into optimal search keywords. Use this FIRST when a user asks a vibe-style question that doesn. It is categorised as a Read tool in the Salesforce Documentation MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on expand_search_query? +

Register the Salesforce Documentation MCP Server MCP server in PolicyLayer and add a rule for expand_search_query: 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 Salesforce Documentation MCP Server. Nothing to install.

What risk level is expand_search_query? +

expand_search_query is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit expand_search_query? +

Yes. Add a rate_limit block to the expand_search_query 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.

How do I block expand_search_query completely? +

Set action: deny in the PolicyLayer policy for expand_search_query. 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.

What MCP server provides expand_search_query? +

expand_search_query is provided by the Salesforce Documentation MCP Server MCP server (salesforcediariesbysanket/salesforce-docs-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Salesforce Documentation MCP Server tool call.

Start from Salesforce Documentation MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →