bookshelf_bulk_update_bookfile

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

The annotations already indicate readOnlyHint=false. The description adds the explicit statement 'WRITE: this modifies your Bookshelf instance,' which reinforces the mutation behavior. However, it doesn't disclose any further behavioral details such as scope of changes, reversibility, or side effects.

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 brief and front-loaded with the primary action. The second sentence about modifying the instance is a useful warning but adds a bit of redundancy given the annotations.

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 bulk update operation with an open-ended body schema, the description is under-specified. It lacks instructions on constructing the request payload, what bookfiles are affected, and how to include update data. The output schema exists, so return values are less critical, but the input side is unexplained.

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 input schema has a single 'body' object with additionalProperties:true and no required fields, and schema coverage is 0%. The description provides no information about what fields the body should contain, how to specify which bookfiles to update, or the expected format. This is a critical gap for a bulk update operation.

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 identifies the tool as a bulk update operation for bookfiles, using the specific verb 'bulk update' and resource 'bookfile editor.' It distinguishes from siblings like bookshelf_update_bookfile (singular) and bulk_delete variants, though not explicitly.

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 provides only a warning that it's a write operation, but no guidance on when to use this tool versus the singular update_bookfile or other bulk operations. No alternatives are mentioned.

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