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

With no annotations, the description must carry behavioral transparency. It says 'Returns a FastAPI handler', which implies it generates code, but it doesn't explicitly confirm that no payment is executed at generation time, or mention authentication or side-effect expectations. This is a moderate gap for an unannotated tool.

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 description is a single, front-loaded sentence that conveys all essential information without filler. Every word earns its place.

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?

The tool has no parameters and an output schema exists, so the description doesn't need to explain return values. It covers framework (FastAPI), target API (Payram create-payment), and the nature of the output (handler). It could more explicitly say 'code snippet' to avoid any ambiguity, but this is largely mitigated by the title and the word 'Returns'.

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?

The input schema has zero properties, so there are no parameters to describe. The baseline for 0-parameter tools is 4, and the description correctly avoids introducing any unnecessary parameter information.

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 states exactly what the tool does: it returns a FastAPI handler that calls Payram's create-payment HTTP API. This is a specific verb ('Returns'), resource ('FastAPI handler'), and target API, clearly distinguishing it from sibling snippets for other frameworks or HTTP/SDK variants.

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 makes the intended context clear: you need a FastAPI handler for Payram's create-payment API. It doesn't explicitly mention alternatives or when not to use it, but the FastAPI scoping is enough to guide selection among the many framework-specific siblings.

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