set_alt_text

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

Discloses that title is removed if empty, but does not describe side effects like document modification or potential irreversible changes. No annotations to supplement.

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?

One succinct sentence for purpose, then clear Args/Returns sections. No redundant information, efficient and well-organized.

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?

Covers parameters and return format. Missing potential error cases (e.g., invalid index) but sufficient for typical use.

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?

Explains each parameter beyond schema: image_index is 0-based across wp:docPr, alt_text is accessibility description, title optional and cleared if empty. Schema had 0% description coverage.

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?

Clearly states action (set alt text), resource (image by 0-based index), and differentiates from get_alt_text. Specific reference to wp:docPr elements adds precision.

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?

Describes what the tool does but does not explicitly differentiate from sibling tools like set_image_alt_text or provide when-to-use vs alternatives.

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