mark_thread_read

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

The description adds 'LOW_WRITE (low risk)', which is useful safety context, but no annotations are present and the description does not explain the behavior of the optional 'confirm' parameter. It also does not disclose whether the operation is reversible, idempotent, or has side effects beyond changing read status.

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 two short sentences with no filler. The action and scope are front-loaded, and the risk label is compactly appended. It is highly efficient for its size.

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 tool with no annotations, no output schema, and a non-obvious optional parameter, this description is incomplete. The confirm parameter contract is entirely omitted, and the agent receives no guidance on prerequisites, return behavior, or failure conditions.

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%, and the description only clarifies thread_id indirectly through the phrase 'all emails in a thread.' It does not explain the 'confirm' parameter at all, leaving the agent to guess whether confirmation is required or what the default false means.

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 ('mark'), a clear resource ('all emails in a thread'), and the outcome ('as read'). This makes it easy to distinguish from read-only sibling tools like list_emails, get_email, and count_unread.

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?

No guidance is given about when to use this tool versus alternatives, and no sibling tools are mentioned. While the action is implied by the tool name and description, there is no explicit context about preconditions, exclusions, or complementary tools.

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