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

The description discloses the partial update behavior ('Send only the fields to be changed'), which is valuable beyond the schema. However, with no annotations provided, the description carries the full burden for behavioral disclosure. It does not mention permissions, error handling, side effects, or the return value, leaving significant gaps for a mutation tool.

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 description is a single sentence with no redundant words. It front-loads the action and the key behavior, making it highly efficient and easy to parse. Every word earns its 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?

The tool has 6 parameters and no output schema. The description only states the action and partial update behavior. It does not describe what the tool returns after update, error conditions, or prerequisites such as list existence. Given the absence of annotations and output schema, the description is incomplete for an agent to fully understand the tool's behavior.

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 0%, so the description must compensate. It clarifies that only fields to be changed should be sent, giving semantic meaning to the optional parameters. However, it does not explain each parameter's specific meaning, though the names (name, event_time, description, rsvp_deadline, event_location) are self-explanatory. The partial update instruction is key but not exhaustive.

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 clearly states 'Actualizează o listă de cadouri existentă' (Update an existing gift list), specifying the verb and resource. It distinguishes from create_gift_list by mentioning 'existing' and from get_gift_list by the update action. The instruction 'Trimite doar câmpurile de schimbat' adds clarity about partial updates, making the purpose unambiguous.

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 description implies the tool is for updating an existing list, which differentiates it from creation or retrieval, but it does not explicitly mention alternatives or when not to use it. There is no reference to sibling tools like create_gift_list or get_gift_list. The 'existing' wording gives a hint but lacks explicit guidance on selection criteria.

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