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

Annotations already declare openWorldHint=true and destructiveHint=false, so the description doesn't need to restate that this hits an external service. It does add genuine context with 'raw public' — the payload is the unmodified API object and only public posts are returned — but it says nothing about auth/quota cost or failure modes for missing or protected IDs, and notably does not explain the tension with readOnlyHint=false on an operation described as 'Get'.

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?

A single front-loaded sentence with no filler. Every element — verb, cardinality, resource, 'raw', 'public', and the accepted identifier forms — carries information.

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?

An output schema exists, so return-shape explanation is rightly omitted, and the one parameter is covered in prose. What remains unaddressed is the behavioral envelope around an open-world call: rate limits, credential requirements, and what happens when the ID is unknown or the post is not public.

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 coverage is 0%, so the description carries the burden for the single 'id' parameter, and it does: it tells the agent the value may be either a tweet ID or a status URL, which the bare `{"type":"string"}` schema does not convey. It could still be sharper about accepted URL forms or numeric-ID format, but the essential semantics are supplied.

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 gives a specific verb and resource ('Get one raw public X Tweet object') and quantifies the scope as a single object, which implicitly separates it from the plural sibling x_tweets and from x_profile. It stops short of naming the alternative explicitly, so an agent must infer the distinction rather than being told.

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 or status URL' signals the intended calling context, so usage is implied. There is no statement of when to prefer this over x_tweets or x_profile, no prerequisites, and no exclusions (e.g. protected or deleted posts), leaving routing to inference.

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