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

The annotations already declare that the tool is destructive, idempotent, and not read-only. The description adds useful workflow context about obtaining listItemRef and using the current list version, but it does not add much behavioral detail beyond that.

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 front-loaded sentence with no wasted text. It gives the primary use case first and then the key reference/version prerequisite.

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?

Given the full parameter schema, rich annotations, and an output schema, the description provides enough context for correct invocation. It could be slightly stronger by clarifying version-conflict behavior or explicitly noting that only the label text changes.

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%, so the schema already documents all five parameters thoroughly. The description reinforces where listItemRef comes from and the need for the current list version, but it adds little semantic detail beyond what the schema provides.

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 states a specific verb and resource: changing the text of an existing list item. This clearly distinguishes the tool from siblings such as add_list_items, remove_list_item, and set_list_item_checked.

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 explicitly says when to use the tool: when you need to change an existing list item's text. It also gives prerequisite guidance for obtaining listItemRef and the current list version, though it does not name alternatives or exclusions.

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