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

Annotations already declare this is a non-read-only, non-destructive, non-idempotent operation, so the safety profile is covered. The description adds plan-based quota limits, which the annotations do not convey, but stops short of saying what happens when the limit is exceeded or whether folder names must be unique.

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 short sentences, purpose first and constraint second, with no redundant wording or restatement of the title.

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 two-parameter creation tool with annotations and full schema coverage, the description supplies everything needed to call it, plus quota context. Only minor gaps remain, such as behavior at quota exhaustion and name-uniqueness expectations.

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%, with both 'name' (1-50 chars) and 'color' (hex) fully documented in the schema. The description adds no additional meaning about these parameters, 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?

Uses a specific verb and resource ("Create a new folder") and adds the intent ("to organize links"), which distinguishes it from delete_folder, update_folder, and list_folders. Clear without needing the schema, though it does not explicitly name siblings.

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?

The quota sentence (Free: 3, Starter: 10, Pro/Builder: unlimited) tells an agent when creation will fail by plan, which is a useful precondition. However, there is no explicit guidance on when to create a new folder versus reuse an existing one, and no mention of the alternative list_folders check.

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