Company search. USE THIS WHEN: - Search for companies by criteria DO NOT USE FOR: - Finding individual people (use peopleSearch) - Getting contact info like email (use syncContactEnrichment after finding profile) EXAMPLE: Input: companySearch_tool(apiKey="sk_live_...", searchParams={}, pageSize=1...
Risk signalsHandles credentials or secrets (apiKey)
Part of the Fiber server.
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AI agents call companySearch_tool to retrieve information from Fiber without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though companySearch_tool only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"companySearch_tool": {}
}
}See the full Fiber policy for all 10 tools.
These attack patterns abuse exactly the kind of access companySearch_tool gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Company search. USE THIS WHEN: - Search for companies by criteria DO NOT USE FOR: - Finding individual people (use peopleSearch) - Getting contact info like email (use syncContactEnrichment after finding profile) EXAMPLE: Input: companySearch_tool(apiKey="sk_live_...", searchParams={}, pageSize=123) INPUT SCHEMA: Required parameters: - apiKey (string): Your Fiber API key. Must start with 'sk_live_' or 'sk_test_'. Example: 'sk_live_dR6DxD3HT7oJqTEV' - searchParams (object): Search parameters for company search API. Properties: ['exactCompanyV2', 'domains', 'headquartersCountryCode', 'headquartersStateName', 'employeeCountV2', 'keywords', 'industriesV2', 'stage', 'totalFundingUSD', 'lastFundingUSD', 'lastFundedOn', 'foundedOn', 'nameLike', 'exactCompany', 'acceleratorsV2', 'employeeTrends', 'headquartersLocation', 'linkedinSlugs', 'specialFlags', 'employees', 'revenueUSD', 'naicsCodes', 'fortuneRankings', 'jobPostingsV2', 'jobPostingStats', 'officeLocationsV2', 'tlds', 'numWordsInName', 'status', 'technologies', 'investors', 'tags', 'crunchbaseCategories', 'crunchbaseCategoryGroups', 'linkedinIndustries', 'crunchbaseSlugs'] Optional parameters: - pageSize (integer): The number of companies to return, if you need to get more results, you can paginate. - cursor (['string', 'null']): A pagination cursor returned from a previous search response. Use this to fetch the next page of results. - companyExclusionListIDs (array of string): Filter out companies which belong to the given company exclusion lists. You can create company exclusion lists via /v1/exclusions/companies/create-list RETURNS: Response object with keys: output, chargeInfo, warnings PERFORMANCE HINT: - Set pageSize=1 to avoid overwhelming the LLM with too much data. - Only request more if specifically asked by the user. COMMON MISTAKES: - Missing apiKey in function call (apiKey is required) - Invalid API key format (must be 18-50 characters) - API key not in request body (always pass as parameter). It is categorised as a Read tool in the Fiber MCP Server, which means it retrieves data without modifying state.
Register the Fiber MCP server in PolicyLayer and add a rule for companySearch_tool: 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 Fiber. Nothing to install.
companySearch_tool 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 companySearch_tool 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 companySearch_tool. 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.
companySearch_tool is provided by the Fiber MCP server (fiberai/fiber-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 10 Fiber tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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