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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the trailing "Read-only." mostly restates structured data. The description does add the return-field set, which is genuine context, but it says nothing about default/max result counts or ordering recency semantics beyond the schema.

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 return contents are front-loaded in the first sentence, followed by usage examples, then a short safety note. Efficient overall, though the closing "Read-only." is largely duplicative of the readOnlyHint annotation and could be dropped.

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 simple zero-required-parameter list tool with no output schema, the description covers what is returned, when to call it, and its safety profile. Only minor gaps remain (result ordering, pagination beyond `limit`), and none would cause a misinvocation.

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 single `limit` parameter already documents default 5 and max 25, so the schema carries the semantic load. The description adds no additional meaning about the parameter, which is acceptable at baseline for full-coverage schemas.

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?

States a specific verb and resource ("Returns recent orders on the customer's account") and enumerates the returned fields, so the agent knows exactly what it gets. It is clearly distinguishable from the other list_my_* siblings (cases, domains, hosting, backups) which cover different resources.

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?

Provides three concrete example user phrasings ("what did I buy recently?", "show me my last order", "what was my last invoice for?"), which is strong positive routing guidance. It does not name an alternative tool or state when NOT to use it, but no sibling provides overlapping order data, so the gap is minor.

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