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

Annotations already declare readOnlyHint=true, and the description's 'Read' is fully consistent with that. The description adds useful context by naming the exact fields returned (title, description, commercial terms, public URL), which helps the agent judge whether this tool satisfies the task before invoking it.

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?

One sentence with the action and resource front-loaded, followed by the return payload. Every word earns its place and there is no redundant or vague filler.

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?

For a single-parameter read operation with readOnlyHint and an output schema, the description is nearly complete: it states what is read and what comes back. It does not define 'Graunt packet' or address not-found behavior, but those are not essential for a correct fetch invocation.

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 single parameter 'id' is fully described in the input schema, so schema description coverage is 100%. The description's 'by id' restates that without adding format, source, or examples, which keeps this at the baseline for an adequately covered parameter.

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 identifies a specific verb ('Read'), a specific resource ('one Graunt catalog packet'), and the mode of access ('by id'). It also lists what is returned, which helps an agent understand the tool's scope. It does not explicitly contrast itself with sibling tools like get_asset or search, so it is clear but not fully differentiated.

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?

'By id' implies the tool is for retrieving a known packet rather than searching for one, so usage context is present only by implication. There is no explicit statement of when to prefer fetch over a sibling search tool, or when not to use it.

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