mark_series_read

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

With no annotations, the description carries full responsibility for disclosure. It only states the basic action without mentioning reversibility, permissions, effect on reading progress, or any side effects. This is minimal and leaves significant behavioral unknowns.

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, direct sentence that front-loads the core action. There is no wasted wording or superfluous information.

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 no annotations and minimal description, the context is incomplete. It lacks advisories about consequences, prerequisites, or edge cases. While an output schema exists, its details are not available, and the description does not compensate for the missing behavioral context.

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?

The schema has one parameter 'series_id' with no description, and the overall description does not clarify what series_id should be, its format, or how to obtain it. Since schema coverage is 0%, the description fails to compensate, leaving the agent with ambiguous parameter semantics.

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 'Mark every book in a series as read' uses a specific verb and resource, clearly indicating the action and scope. It distinguishes itself from the sibling 'mark_series_unread' by explicitly stating 'read'.

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 provided on when to use this tool versus alternatives such as mark_series_unread or set_book_read_progress. The description states what it does but not the conditions under which it should be chosen.

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