Create image

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

With no annotations at all, the description carries the full behavioral burden. 'Insert' implies a mutation, but nothing is said about required scopes/permissions, whether the image is downloaded and stored, what happens on an unreachable URL, or whether the operation is reversible. Only the URL source and point-based sizing are disclosed.

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?

Two sentences, front-loaded with the action and with zero filler. The trailing fragment 'Sizes in points' is terse but does earn its place by flagging the unit system.

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 an eight-parameter mutation tool with no annotations and no output schema, the description omits too much: no return information (e.g. whether an image object ID comes back), no auth requirements, and no failure modes. The schema covers inputs fully, but the behavioral and output surface is entirely undocumented.

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 eight parameters including defaults (x=0, y=0, width=200, height=150) are already documented. 'Sizes in points' restates the unit already present in the schema and adds no new syntax or format detail; baseline 3 applies.

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 and resource ('Insert an image ... onto a slide'), which is enough to separate it from adjacent Slides tools like add_slide or create_textbox. It does not explicitly name a sibling or disambiguate from google_docs_insert_inline_image, but the verb+resource pairing 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?

There is no guidance on when to use this tool versus alternatives (e.g. batch_update, create_textbox), and no prerequisites are stated. The requirement that the URL be publicly reachable and that the target slide already exist is left entirely to the schema.

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