get_carbon_intensity

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

No annotations are provided, and the description does not disclose any behavioral traits such as rate limits, data freshness, authentication requirements, or side effects. The tool performs a read operation, but this is not explicitly stated, and the description carries the full burden of transparency.

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 sentence of 12 words, with no filler or redundancy. Every word earns its place, making it highly efficient while still conveying the essential information.

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 only one optional parameter and an output schema is present, so the return format is covered. However, the description lacks any mention of data source, refresh interval, or potential error conditions. For a simple tool, it is adequate but not fully complete.

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 0% description coverage, but the description mentions 'optionally for a regional intensity region ID', clarifying that region_id is optional and its purpose. This adds value beyond the schema alone, though no details on valid values or format are provided.

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 retrieves 'current GB carbon intensity', with an optional regional filter. The verb 'Get' and specific resource 'carbon intensity' make the purpose unambiguous, and it stands out among sibling tools like get_bank_holidays or get_cpih_inflation_headline.

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?

No guidance is given on when to use this tool versus alternatives. There is no mention of prerequisites, context, or when to avoid using it. The description simply states what the tool does, leaving the agent to infer usage from the name alone.

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