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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so safety is covered; the description adds the useful non-obvious guarantee that reading does not attach the document to a project, i.e. no state side effect. It does not discuss the image/page fallback or return shape, keeping it below 5.

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 compact sentence that front-loads the action, the resource, the addressing key and the scoping caveat. No wasted words.

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?

With an output schema present and full parameter coverage, the description covers what an agent needs to call it. The one small gap is that it says 'read the text' while the tool can also return a page image, though the schema explains that tradeoff fully.

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%, including the page-overrides-text behavior and the document_id source, so the schema does the heavy lifting. The description only echoes 'search-documents id', adding little beyond the schema's own note that the id comes from documents[].id.

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 (Studocu document text) plus the addressing mechanism (search-documents id), which cleanly distinguishes it from the search-documents sibling. It stops short of naming an alternative tool outright, but the resource/mechanism pair is unambiguous.

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 'by its search-documents id' implies the prerequisite of calling search-documents first, and 'without adding it to a project' hints at the contrasting case. However, there is no explicit 'use this when...' or named alternative, so the 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.