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

Adds real behavioral context beyond the annotations: the tool does not generate immediately but 'shows a selector where the user picks the format', which explains why readOnlyHint/idempotent true makes sense for a create-named tool. It does not say anything about content sourcing requirements or what happens after the user picks a format.

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, zero waste, with the usage trigger front-loaded and the selector behavior following. Nothing redundant with the title or annotations.

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?

Annotations plus fully-described schema carry most of the burden for this 13-parameter, no-output-schema tool, and the description covers the dispatch/selector behavior. It omits any hint about the source-selection model (unit_id vs url/notes sources vs auto_research), which an agent must infer purely from the schema.

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 all 13 parameters (unit_id vs sources, auto_research defaults, media URLs) are already documented in structured form. The description adds no parameter-level meaning beyond the schema, so the baseline of 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 and resource ('Create a quiz') and adds the key differentiator 'without naming a format', which separates it from the many format-specific siblings (create_mcq, create_fill_blank, create_ranking, create_crossword, create_flashcards). An agent can pick this tool without inspecting any sibling schema.

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?

Gives a clear trigger condition: the user asks for a quiz or to be tested but has not named a format. The inverse condition (use the format-specific tools when a format IS named) is implied by the enumerated formats but never stated as an alternative route.

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