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

Annotations only declare that this is a non-readOnly, open-world, non-idempotent, non-destructive write. The description adds genuinely useful behavior beyond that: it returns a plan summary plus a shareable link, and requires no account or email. It misses one annotation-relevant detail — since idempotentHint=false, each call presumably creates a new plan/link, which the description doesn't warn about.

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?

Three sentences, front-loaded with the action and artifact, followed by the return behavior and the usage trigger. Nothing repeats the schema or pads the definition.

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 no output schema present, the description correctly spells out what comes back (summary + shareable link) and removes auth concerns. Only the repeat-invocation behavior implied by idempotentHint=false is left unexplained, which is a minor gap for a two-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 description coverage is 100%, so both parameters are already documented, including email being optional and not needed for the result. The description reinforces the flexible content of 'syllabus' (topics or a plain description) but adds no syntax, length, or formatting guidance beyond the schema, so the baseline 3 applies.

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 ('Create') plus resource ('personalized week-by-week study plan') and enumerates the accepted input forms (syllabus, exam topics, freeform description). The artifact produced is clearly distinct from sibling generators like generate_flashcards or generate_quiz, so no explicit sibling callout is needed.

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?

Explicitly names the trigger: 'Use it when a student asks for help planning their studying or exam prep.' That is a clear usage context, though it gives no when-not guidance or points to alternative tools for adjacent needs.

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