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

Annotations already declare readOnly, idempotent, non-destructive, closed-world behavior, so safety is covered. The description adds only that the assets are team-saved/shared; it says nothing about return shape, grouping of hashtags vs snippets, or limits, so it adds modest value beyond structured fields.

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?

Two short sentences, front-loaded with what the tool returns and then the action guidance. Every sentence earns its place with no 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 read-only, single-optional-param list tool with no output schema and full schema coverage, the description plus annotations give the agent enough to invoke it correctly. Minor gaps (whether hashtag groups and snippets come back together, pagination) are not essential to correct 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?

With 100% schema description coverage on the single workspaceId parameter, the schema already carries full parameter meaning. The description adds no parameter detail, which matches the baseline 3 when the schema does the heavy lifting.

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 resolves the vague name 'writing_assets' by stating these are team-saved hashtag sets and reusable text snippets, which is exactly what an agent needs to know. It is clear but does not name a sibling tool to differentiate against (e.g. suggest_hashtags or list_saved_replies).

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?

'Use theirs instead of inventing hashtags' gives a clear usage directive that steers the agent toward saved assets rather than generation. It does not explicitly name the alternative tool or state when-not to use it, so it falls short of full routing guidance.

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