Provider delivers the output for an accepted request (requires an API key).
| Name | Required | Description | Default |
|---|---|---|---|
| apiKey | No | API key for authenticated actions. On the local server, prefer setting PAYANAGENT_API_KEY instead. Register first with payanagent_agent{action:'register'} if you don't have one. | |
| output | Yes | Deliverable payload as a string. | |
| requestId | Yes |
Changes observed during successful MCP inspections.
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are present, so the description carries full burden. It discloses authentication requirements (API key) and hints at environment variable usage via the apiKey parameter. However, it does not describe side effects, state changes, or whether the operation is idempotent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The main description is a single sentence, which is concise. It could be slightly more structured, but it is not overly verbose. The parameter descriptions within the schema are also appropriate in length.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given no output schema, no annotations, and a write-oriented tool, the description lacks details on return values, error handling, or confirmation of fulfillment status. It is incomplete for an agent to fully understand the tool's behavior.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 67% (2 of 3 parameters described). The description adds value for 'output' by labeling it 'Deliverable payload', and for 'apiKey' by including registration and environment variable guidance. The 'requestId' parameter lacks any description in both schema and main description.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool delivers output for an accepted request, specifying the role of 'provider'. However, it does not explicitly differentiate from sibling tools like payanagent_create_request, though the verb 'fulfill' implies distinct purpose.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description only mentions requiring an API key, with the apiKey parameter providing prerequisite registration guidance. No explicit when-to-use or when-not-to-use context is provided for this tool versus alternatives.
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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