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lzinga

US Government Open Data MCP

open_payments_ownership

Read-only

Find doctors with ownership or investment stakes in pharmaceutical and medical device companies using Open Payments data.

Instructions

Search Open Payments OWNERSHIP data — doctors with ownership or investment stakes in pharma/device companies. The deepest form of conflict of interest. Shows which doctors have financial interests in the companies whose products they prescribe.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
companyNoCompany name: 'Pfizer', 'Johnson & Johnson'
doctorNoDoctor last name
stateNoTwo-letter state: 'CA', 'WA'
yearNoYear (auto-discovers latest if omitted)
limitNoMax results (default 20)
Behavior3/5

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

Annotations already declare readOnlyHint=true, so the description's addition of 'deepest form of conflict of interest' adds context about the nature of the data. However, no further behavioral traits (e.g., pagination, rate limits) are disclosed.

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 concise with two sentences that front-load the core purpose and add emphasis. No unnecessary wording.

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

Completeness3/5

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

For a search tool with no output schema, the description adequately explains the purpose but omits what the output contains (e.g., doctor names, companies). Completeness is moderate.

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 parameters are well-documented in the schema. The description adds no additional parameter semantics beyond what the schema provides, warranting a baseline score of 3.

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 clearly states the tool searches Open Payments OWNERSHIP data, specifically doctors with ownership stakes. It distinguishes itself from siblings like open_payments_by_company or open_payments_by_physician by focusing on ownership data.

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

Usage Guidelines2/5

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

The description does not provide any guidance on when to use this tool versus alternatives. It lacks explicit context for when to choose ownership search over other Open Payments tools like general search or research.

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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