complete_shopping_list_item

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

With no annotations supplied, the description carries the full burden. It does disclose two real behavioral traits beyond the schema: this is a persistent Firestore write, and it is gated behind a confirm=true safety flag. It still omits permissions, reversibility of the tick, and any side effects on list counters or members.

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 with zero filler, and the primary action is front-loaded ahead of the confirm requirement. Nothing needs cutting; the brevity is limited only by how little it says.

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 mutation tool with output schema but no annotations and 0% parameter coverage, the description leaves too much unstated: the meaning of completed=false, what confirm guards against, and what authorization or list membership is required. The presence of an output schema excuses it from explaining returns, but not from the input and safety gaps.

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 for all four parameters. It covers only confirm, and while 'tick (or untick)' hints at the completed boolean with its default of true, it never states that mapping explicitly, nor does it say what list_id and item_id address.

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 names a specific verb pair ('tick/untick') and a specific resource ('shopping-list item'), which clearly separates it from add_shopping_list_item and remove_shopping_list_item. It stops short of explicitly naming those siblings or stating its scope relative to them.

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?

There is no when-to-use guidance: nothing tells the agent to prefer this over add/remove_shopping_list_item or shopping_list_items when the goal is toggling state. The only usage-like statement, 'Needs confirm=true', is a hard requirement rather than contextual guidance, and no exclusions or prerequisites are given.

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