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

Annotations only declare a non-destructive mutation, so the bar is lower. The description adds genuine behavioral context: the guest_token for later calls and deck_url as 'the one link to give the user' when unauthenticated, plus the fact that each reply carries the next page's brief. It does not address auth/rate limits, but the return-value disclosure is real added value.

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?

Purpose is front-loaded, but the brand paragraph ('read its real colours... not the link colour... never invent a colour') is verbose and duplicates the schema's accent description. Several sentences are spent re-explaining structured fields rather than earning their place.

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 5 nested parameters, no output schema, and only readOnly/destructive hints, the description covers the new-deck workflow and the key returns (guest_token, deck_url). It is nearly complete, though it omits what differs for authenticated users and does not state the brief/outline preconditions it depends on.

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 the schema already documents all parameters thoroughly (accent even repeats 'Never invent one'). The description's brand-colour guidance largely restates what the accent/website schema fields already say, adding little parameter meaning beyond the schema; baseline 3 is appropriate.

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?

Opens with a specific verb+resource: 'Start a new presentation from a brief, the brand and your outline.' An agent can tell it initiates a deck rather than advancing one (submit_page/submit_deck). However, it never crisply contrasts itself against the sibling write_outline, leaning on workflow narration instead of a direct distinction.

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 workflow context ('with the outline the reply carries PAGE 1'S BRIEF; write page 1 and send it with submit_page'), which implies usage. But it never states when to call create_deck versus write_outline or submit_deck, nor prerequisites for an existing vs new deck; the alternates are only implied through the schema's 'one call instead of create_deck + write_outline' note.

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