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

Annotations already disclose mutation behavior (readOnlyHint false), non-destructiveness, non-idempotence, and open-world interaction. The description adds that content is updated on an existing slide, but it does not clarify partial-update semantics, e.g., whether omitted fields remain unchanged or whether bullet lists are replaced wholesale. With annotations covering safety, a 3 reflects useful but limited extra behavioral context.

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?

A single front-loaded sentence with zero redundant wording. It efficiently conveys the operation, editable content types, and target context. Every phrase contributes to understanding.

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 straightforward mutation tool with rich annotations and full schema coverage, the description is nearly complete: it states what is updated and where. It omits potentially important update semantics (partial vs. full replacement of bullets or notes) but covers enough for an agent to invoke it correctly given the annotations and schema.

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 all five parameters are already documented in the schema. The description maps its content terms to title, bullets, and notes, but adds no format or constraint details beyond what the schema provides. Baseline 3 is appropriate because the schema carries 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 states a specific verb ('Update') and lists concrete editable content types: headline, bullet points, and speaker notes. It also scopes the target to an existing slide, which distinguishes it from creation-oriented siblings like add_slide or create_presentation. It stops short of explicitly naming when this tool is preferable to alternatives, but the purpose is unambiguous.

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?

Usage is implied by 'on an existing slide' and the specific editable fields, but there is no explicit when-to-use or when-not-to-use guidance. No alternative tools are named, and it does not state prerequisites such as the slide index needing to exist. Adequate but leaves the agent to infer routing context.

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