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. It describes the contents of the metadata but not the tool's behavior: whether it requires parameters, supports partial lookups, returns multiple results or a single spec, or has any default/fallback behavior. The read-only nature is implied by 'lookup' but not explicitly disclosed.

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 with no filler and front-loads the core concept ('UK exam specification metadata'). The list of covered fields is compact but somewhat dense; however, it earns its place by signaling the tool's scope.

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 annotations, no output schema, and no parameter descriptions, the definition is not complete enough for an agent to invoke the tool with confidence. It does not explain what a successful response looks like, whether all parameters are optional, or how to narrow a lookup. The sibling tools are not addressed, leaving potential routing ambiguity.

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 and no enums, and the description does not explain the board, level, or subject parameters. Although the parameter names are somewhat self-explanatory, the description does not define acceptable values, how parameters combine, or whether they are optional. The description lists metadata categories but does not connect them to the parameters.

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 names a specific resource ('UK exam specification metadata') and lists concrete contents (spec codes, paper structure, topics, links), so an agent can tell what the tool returns. It lacks an explicit verb like 'look up' but the tool name and content make the purpose reasonably clear. It is not explicitly differentiated from sibling tools, though the metadata list helps.

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 provided about when to use this tool versus exam_paper_index or exam_topic_paper. There is no statement of intended use, filtering strategies, or exclusions. The description merely states what metadata is available, leaving usage entirely implied.

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