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

Annotations already declare readOnly/idempotent/non-destructive/non-open-world, so the bar is lower. The description adds genuinely useful behavior beyond them: 'Costs no credits' (relevant in a credit-metered tool family) and an explicit SIGN-IN REQUIRED block with both OAuth and API-key header paths.

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?

Front-loaded with the purpose and cost note before the auth detail, and every sentence carries information. The auth block is verbose but justified for a sign-in-gated server.

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?

An output schema exists, so return values need not be explained; annotations carry the safety profile; and the auth requirement is fully spelled out. Nothing an agent needs to invoke this correctly is missing.

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%, and the single param (canvas_id) is already documented as 'The board id, from list_canvases or create_canvas'. The description adds no syntax or sourcing detail 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 and resource: 'Get the link to a board's page on AI Content Drop'. The 'link/page in a browser' framing implicitly separates it from get_canvas (content) and list_canvases, though no sibling is named explicitly.

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 clear usage context — the link is for opening in a browser or the host's embedded browser panel — so the agent knows the scenario. It does not explicitly name alternatives (e.g. get_canvas) or state when-not to use it, so it stops short of a 5.

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