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by dev.hatchloop
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lookup_us_contracts

Read-onlyIdempotent

Search US federal contract awards by company (recipient) name using the free USASpending.gov public API. Returns the top awards sorted by dollar amount: award ID, recipient name, award amount USD, awarding agency, NAICS code/description, and period of performance. Zero upstream cost, no key required. Data covers 2020-2026 procurement contracts. [free, no key]

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "company_name": "<company_name>"
    },
    "name": "lookup_us_contracts"
  }
}

Input Schema

NameRequiredDescriptionDefault
max_resultsNoMaximum number of contract awards to return (sorted by award amount…
company_nameYesCompany or recipient name to search for in US federal contract awards (e.g.…

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changed
    • changedInput schema / properties / company_name / description
      Previous value: -"Company or recipient name to search for in US federal contract awards (e.g. \"Lockheed Martin\", \"Booz Allen Hamilton\", \"Palantir Technologies\")."New value: +"Company or recipient name to search for in US federal contract awards (e.g.…"
    • changedInput schema / properties / max_results / description
      Previous value: -"Maximum number of contract awards to return (sorted by award amount descending). Default: 5, max: 10."New value: +"Maximum number of contract awards to return (sorted by award amount…"
  2. Added

TDQS

A4.2/5.0
Behavior4/5

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the description adds value by mentioning 'Zero upstream cost, no key required' and the data coverage range (2020-2026). It also specifies the sorting behavior (by dollar amount), which is useful beyond the annotations.

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 compact, front-loaded with the core action, and each sentence adds relevant information (API source, output fields, cost, key requirement, data range). No wasted words.

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 simple 2-parameter read-only tool with no output schema, the description covers the essentials: what it returns, the data source, and constraints. It does not cover error handling or pagination, but these are minor for this use case and annotations already cover the safety profile.

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?

Schema description coverage is 100%, so the parameters are already documented. The description adds minimal extra meaning, only reiterating the sorting by award amount for max_results and the search intent for company_name. This is within the baseline for full schema coverage.

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 states a clear verb ('Search') and resource ('US federal contract awards by company name') and lists the specific output fields. It is distinct from the sibling tools (which appear unrelated to contract lookup) and leaves no ambiguity about what the tool does.

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 description clearly conveys when to use the tool (for US federal contract awards by company) and implicitly that it is for read-only lookups. However, it does not explicitly name alternatives or state when not to use it, but given the sibling tools are unrelated, the context is sufficient.

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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