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

No annotations are provided, so the description carries full responsibility. It discloses that the tool returns metadata, a content URL, provision count, and XML/HTML links, which are helpful output details. However, it does not mention potential errors, required permissions, or whether the path must be valid, leaving some behavioral gaps.

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 two short sentences, front-loaded with the core purpose and then adding return details. Every word is useful, with no wasted space or redundancy.

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 its simplicity (one parameter, no output schema), the description is adequate but thin. It explains what it returns and mentions the content URL, but it does not explicitly state that the act_path parameter is needed to identify an act, nor does it mention error cases or navigate the optional-parameter oddity (required: 0). The tool is simple enough that this is a minor gap, but it prevents full completeness.

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 100% and the parameter description includes an example ('ukpga/2023/29'), so the schema already carries the semantic weight. The tool description adds no additional parameter guidance beyond what the schema provides, hence the baseline score of 3.

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 uses a specific verb ('Get') and resource ('UK act metadata and content URL'), and clearly distinguishes from sibling tools like uk_legislation_search by focusing on a single act's metadata rather than searching. It also states what is returned (provisions count, XML/HTML links), making the purpose unambiguous.

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 provides no guidance on when to use this tool versus alternatives (e.g., uk_legislation_search or other jurisdiction-specific lookups). No context or exclusions are mentioned, leaving the agent to infer appropriate usage from siblings.

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