Weather MCP Tool

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. However, it reveals nothing about the tool's behavior—whether it's a read-only operation, requires authentication (implied by 'signed_b64_payload'), has rate limits, or what the output might be. This leaves critical operational traits completely opaque.

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 extremely brief ('Call self as a function.'), which might seem concise, but it's under-specified rather than efficient. It wastes its single sentence on a tautology that provides no value, failing to front-load useful information or structure content meaningfully for the agent.

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 the tool's complexity (2 parameters, no output schema, no annotations), the description is completely inadequate. It lacks purpose, usage, behavioral details, parameter explanations, and any mention of return values, making it insufficient for an agent to understand or invoke the tool correctly in any context.

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 2 parameters with 0% description coverage, meaning no parameter details are documented in the schema. The description adds no semantic information about parameters like 'city' (e.g., format, examples) or 'signed_b64_payload' (e.g., purpose, when required), failing to compensate for the schema's lack of documentation.

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 'Call self as a function' is a tautology that merely restates the tool's name 'get_weather' in abstract terms, providing no information about what the tool actually does. It fails to specify the verb (e.g., retrieve, fetch) or resource (e.g., weather data, forecasts), making it completely unhelpful for understanding the tool's 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 offers no guidance on when to use this tool, such as for checking current weather, forecasts, or specific conditions. With no sibling tools mentioned, there are no alternatives to differentiate from, but the description still provides zero context or prerequisites for usage, leaving the agent with no actionable information.

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