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

The annotations already establish readOnly=true, idempotent=true, destructive=false, and the description is consistent with them, adding the key behavioral fact that the call 'opens nothing by itself' and only returns textual steps. It also discloses the granularity of the return value (screens, buttons, fields), which matters because there is no output schema. The unexplained trailing claim 'Brandfolder's official API: Yes.' adds little behavioral clarity.

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 essential fact, that this returns steps rather than performing the add, is front-loaded in the opening sentences and the next-tool handoff follows immediately. The only waste is the dangling 'Brandfolder's official API: Yes.' fragment, which reads as unexplained metadata.

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 parameterless, annotation-covered guidance tool with no output schema, the description covers what an agent needs: what it returns, that it performs no action, and which tools continue the workflow. It could be stronger by noting what user-supplied context (the source URL, the destination Brandfolder/collection) the agent should collect before calling.

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?

With zero parameters and 100% schema coverage there is nothing for the description to disambiguate, so the baseline applies. The one gap is that it never says the agent must already know the asset URL and target Brandfolder from the conversation, which is the de facto input for a parameterless 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?

The description makes clear this is not an execution tool but an instruction generator: it 'Returns how to do it in Brandfolder step by step (screens, buttons, fields) and opens nothing by itself.' That said, the leading phrase 'Add asset from URL' and the tool name suggest a write action, so the agent must read the second sentence to learn the true nature. It is specific about the resource (asset from URL in Brandfolder) but does not contrast with the other guidance-style sibling (cotlet_app_guide).

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?

It gives explicit sequencing: first call this to get the steps, 'then do it with the cotlet_browser_* tools in the user's Brandfolder Cloud Browser.' That tells the agent this is the entry point for the workflow. It stops short of stating when not to use it (e.g., when the user wants a different Brandfolder operation) or naming the generic app-guide alternative, so it is clear context without full routing.

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