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

Annotations declare readOnlyHint=true and idempotentHint=true, which would look strange for a 'create' tool; the description resolves that tension by stating it 'opens nothing by itself' and only returns guidance. That is exactly the behavioral context an agent needs. The closing sentence about Unsplash's public REST API and hosted MCP server adds no behavioral information.

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?

The operational content is front-loaded and tight, but the final sentence about Unsplash's official API, REST v1, mcp.unsplash.com and a 'checked 6 Nov 2026' date is off-topic filler that does not help an agent select or invoke the tool. Trimming it would make this a well-structured two-sentence 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?

For a zero-parameter, non-mutating guidance tool with no output schema, the description covers what it returns (steps, screens, buttons, fields) and what to do next. Nothing an agent needs in order to call it correctly is missing, though the return value's exact shape is only loosely sketched.

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?

The tool takes zero parameters and the schema is empty, so there is no parameter meaning to convey and no risk of ambiguity. Baseline for a no-argument tool.

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?

Names a specific verb and resource ('Create collection in the user's own Unsplash account') and then immediately clarifies the actual mechanism: it returns step-by-step instructions rather than performing the action. That correction keeps an agent from mistaking it for a real mutation, though the leading 'Create collection' phrasing is slightly at odds with the true behavior and has to be undone one clause later.

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 routes the agent: call this to get the Unsplash steps, then execute them with the cotlet_browser_* tools in the user's Unsplash Cloud Browser. The handoff is clear. It does not say when *not* to use it (e.g., versus the sibling collection tools), but the alternatives it does name are the relevant ones for this workflow.

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