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

With no annotations, the description carries the full burden and does disclose the authorization model (ownership/operator grant, denial of other IDs) and that authorship, media, URLs and publication state are read-only. It omits error/denial behavior and any rate or token constraints, so it is strong but not complete.

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 sentences, purpose front-loaded, with no filler. The opening clause is dense and slightly awkward ('an owned or explicitly operator-granted selected material'), but it earns its place by packing scope, access model and returned fields together.

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?

No output schema and no annotations, so the description must do everything; it does describe returned content and read-only fields, which covers the main gaps. It falls short on the token parameter and on failure/denial behavior, so it is adequate but not fully complete for a two-required-parameter tool.

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% and neither parameter has a description. The phrase 'by ID' loosely maps to article_id, but the required 'token' parameter is entirely unexplained in both schema and description, leaving half the inputs undocumented.

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 (Read) and resource (material by ID) plus the payload it returns (revision and plain text of existing parts), which is enough to distinguish it from online_articles_list and online_article_update. However, it never names or contrasts those siblings explicitly, and the term 'selected material' is looser than 'article'.

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?

It gives an access precondition ('owned or explicitly operator-granted') and an exclusion ('Other IDs are denied'), which is real usage context. But it never says when to prefer this over online_articles_list (to find an ID) or online_content_get, so the routing guidance is only implied.

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