search_vendor

THE RISK

Low Risk

Why search_vendor needs a policy

This tool performs a read-only search operation to locate vendor records. The description explicitly notes that vendors must be created manually in Wave, confirming this tool only retrieves existing data. No data is modified, created, or deleted.

From the tool's definition The tool description states it 'Search[es] for an existing vendor in Wave' with no mention of creation, modification, or deletion. This is a query operation that retrieves vendor information without side effects.

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

POLICY

How to control search_vendor

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

policy.json

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

search_vendor 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 Wave Accounting 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

More Wave Accounting MCP Server tools

Write create_expense_from_receipt Create an expense in Wave from receipt data. Vendor is optional - expenses can be created Write create_income_from_payment Create an income transaction in Wave from payment/receipt data. Customer is optional - inc Write set_business Set the active business for operations Read debug_accounts Debug tool: List ALL accounts with their types and subtypes to help diagnose account detec Read get_expense_accounts Get a list of expense accounts to help categorize receipts Read get_income_accounts Get a list of income accounts to help categorize income transactions Read list_businesses List all available Wave businesses with pagination Read search_customer Search for an existing customer in Wave

All 9 Wave Accounting MCP Server tools →

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 search_vendor

What does the search_vendor tool do? +

Search for an existing vendor in Wave (vendors must be created manually in Wave. It is categorised as a Read tool in the Wave Accounting MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on search_vendor? +

Register the Wave Accounting MCP Server MCP server in PolicyLayer and add a rule for search_vendor: 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 Wave Accounting MCP Server. Nothing to install.

What risk level is search_vendor? +

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

Can I rate-limit search_vendor? +

Yes. Add a rate_limit block to the search_vendor 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 search_vendor completely? +

Set action: deny in the PolicyLayer policy for search_vendor. 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 search_vendor? +

search_vendor is provided by the Wave Accounting MCP Server MCP server (vinnividivicci/wave_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Wave Accounting MCP Server tool call.

Start from Wave Accounting 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 →