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

Annotations already declare readOnly, idempotent, non-destructive, and closed-world, so the safety profile is covered. The description adds real context beyond that: the output is Persian (fa-IR, RTL) text from public fekrestan.com pages for parents and teachers, and exercise answers are excluded. However, "Same content limits as the other tools" is a dangling reference that tells the agent nothing concrete, and truncation/length behavior is never stated.

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 opening clause is front-loaded and specific, which is good, but the middle sentence ("Same content limits as the other tools") is an unearned placeholder that adds ambiguity rather than information. The language switches between Persian and English and the final sentence partially overlaps with the opening enumeration, so the content could be tightened.

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 one-parameter read-only fetch with no output schema, the description covers the essential: what it returns, in what language/direction, from which domain, and one content exclusion. The remaining gaps (truncation, behavior on a URL not obtained from search, relation to the specialized getters) are real but comparatively minor.

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 one parameter and 100% schema coverage, the schema already documents that `id` is a URL returned by search, including the pattern and length bounds. The description's "(id = its URL)" largely restates that. Baseline 3 applies; nothing about error behavior for non-search URLs is added.

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 action and resource: return the text of ONE public page, identified by its URL, and enumerates the page kinds it covers (article, «روش حل», subject, station). It links itself to `search` as the source of the id. It stops short of distinguishing itself from the dedicated getters in the sibling list (get_article, get_subject, get_station_overview, get_how_to_solve), which cover the same page types.

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?

The phrase "found with search" implies the intended workflow (search first, then fetch by URL), and "No answers to in-app exercises" sets one boundary. But there is no explicit guidance on when to use this generic fetch versus the concrete per-type siblings like get_article or get_subject, which is the main selection decision an agent faces here.

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