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Fintel Discovery — Financial Intelligence for AI Agents

by io.github.findimitrov
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Search FINRA BrokerCheck — Firms

SearchBrokerCheckFirm
Read-onlyIdempotent
    Search FINRA BrokerCheck for broker-dealer firms by name. Returns firm
    CRD, registration status, city, state, and disclosure flag.

    Use this tool when:
    - You need the CRD number for a broker-dealer firm (e.g. UBS, Raymond James)
    - You want to distinguish between similarly named firms by location
    - You are building a territory map of BD firms in a state

    Source: FINRA BrokerCheck public API. No API key required.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
paramsNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedInput schema / $defs / BrokerCheckFirmSearchParams / properties / mcp_prompt_id / default
      Previous value: -"f258bd16-f060-4e4a-a55d-221a0484866d"New value: +"05525087-35e9-4aac-b06d-6d88ce386b2e"
  2. Changed1 schema field changed
    • changedInput schema / $defs / BrokerCheckFirmSearchParams / properties / mcp_prompt_id / default
      Previous value: -"5f4db44b-e5cc-4f3a-8da3-ac591a019c81"New value: +"f258bd16-f060-4e4a-a55d-221a0484866d"
  3. Changed1 schema field changed
    • changedInput schema / $defs / BrokerCheckFirmSearchParams / properties / mcp_prompt_id / default
      Previous value: -"d9f77642-e017-4785-9150-e658c2dba3a0"New value: +"5f4db44b-e5cc-4f3a-8da3-ac591a019c81"
  4. Changed1 schema field changed
    • changedInput schema / $defs / BrokerCheckFirmSearchParams / properties / mcp_prompt_id / default
      Previous value: -"dbe99169-c071-4ed4-9ae9-8bbfb9a88ad8"New value: +"d9f77642-e017-4785-9150-e658c2dba3a0"
  5. Changed1 schema field changed
    • changedInput schema / $defs / BrokerCheckFirmSearchParams / properties / mcp_prompt_id / default
      Previous value: -"3775b46a-5aa8-4586-af57-2453c8bcd08c"New value: +"dbe99169-c071-4ed4-9ae9-8bbfb9a88ad8"
  6. Changed1 schema field changed
    • changedInput schema / $defs / BrokerCheckFirmSearchParams / properties / mcp_prompt_id / default
      Previous value: -"d81a5175-11e9-494a-baa5-71d4ffad4ab9"New value: +"3775b46a-5aa8-4586-af57-2453c8bcd08c"
  7. Changed1 schema field changed
    • changedInput schema / $defs / BrokerCheckFirmSearchParams / properties / mcp_prompt_id / default
      Previous value: -"9e7f8798-7d22-4378-b93d-179c6f8cb854"New value: +"d81a5175-11e9-494a-baa5-71d4ffad4ab9"
  8. Changed1 schema field changed
    • changedInput schema / $defs / BrokerCheckFirmSearchParams / properties / mcp_prompt_id / default
      Previous value: -"9919ff85-e960-472f-863b-3de4c5abed9f"New value: +"9e7f8798-7d22-4378-b93d-179c6f8cb854"
  9. Changed1 schema field changed
    • changedInput schema / $defs / BrokerCheckFirmSearchParams / properties / mcp_prompt_id / default
      Previous value: -"38452924-d5df-4668-b51c-d7cd5acabc09"New value: +"9919ff85-e960-472f-863b-3de4c5abed9f"
  10. Changed1 schema field changed
    • changedInput schema / $defs / BrokerCheckFirmSearchParams / properties / mcp_prompt_id / default
      Previous value: -"fa72f604-6239-428b-81df-11f07c2c8d00"New value: +"38452924-d5df-4668-b51c-d7cd5acabc09"
  11. Changed1 schema field changed
    • changedInput schema / $defs / BrokerCheckFirmSearchParams / properties / mcp_prompt_id / default
      Previous value: -"7b866f24-13ab-4e54-8d3a-f775612c393f"New value: +"fa72f604-6239-428b-81df-11f07c2c8d00"
  12. First observed

TDQS

A4.2/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnly, idempotent, non-destructive, and non-open-world behavior. The description adds useful context beyond those annotations: it is sourced from FINRA BrokerCheck's public API and requires no API key. It does not discuss rate limits, pagination behavior, or caching follow-ups, so it is strong but not exhaustive.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is front-loaded with purpose and returns, then structured with clear usage bullets and source/auth information. Every sentence adds useful context, and there is no filler.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a read-only search tool with a rich nested input schema and an output schema, the description covers purpose, triggers, source, and returned fields adequately. It could better route agents away from sibling tools such as SearchBrokerCheck or GetBrokerCheckDetail, but the definition is otherwise complete enough to invoke correctly.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The description only maps to the name and location concepts ('by name', distinguishing by location), while the nested schema documents the individual parameters in detail. Because the structured schema carries most parameter meaning, the description meets the baseline for high schema coverage without substantially enriching parameter semantics.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description gives a specific verb and resource: searching FINRA BrokerCheck for broker-dealer firms by name. It also scopes the result fields (CRD, registration status, city, state, disclosure flag), which clearly differentiates it from broader or detail-oriented siblings like SearchBrokerCheck and GetBrokerCheckDetail.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The 'Use this tool when' bullets give clear positive triggers: finding a firm CRD, disambiguating similarly named firms by location, and building a state-level territory map. It does not name alternatives or say when not to use this tool, so it stops short of the top score.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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