Add Team Grid Slide (Step 1 Layout)

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

Annotations already declare readOnlyHint=false, idempotentHint=true and destructiveHint=false, so the safety profile is covered for free. The description adds genuinely useful visual behavior (circular clip mask, minimum 24pt body text, 44pt cyan presenter badge), which tells the agent what the rendered output will look like. It omits operational behavior the annotations do not cover: that the slide is written into a .pptx at presentation_path, how slide_number insertion affects existing slides, and that a thumbnail PNG is exported by default.

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 that opens with the primary action and then qualifies it with layout specifics; nothing is redundant or padded. It is dense with styling constants, but each clause conveys a real constraint on the produced slide.

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 10-parameter slide-construction tool with no output schema, the description covers the core layout and the visual result adequately, and full schema coverage handles the remaining parameters. What is missing is where the output lands (which deck, which slide position) and the thumbnail export side effect, which the agent would only learn by reading the parameter list.

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 every one of the 10 parameters already carries its own documentation and the baseline is 3. The description reinforces the member-count constraint and the presenter badge defaults, but adds no syntax, format or edge-case detail (e.g. what happens with duplicate names, how avatarUrl failures are handled) beyond the schema.

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 concrete action and artifact: building a grid of team-member introduction cards holding 2-6 people, with circular avatar clip masks, roles, bios and a presenter badge. That is far more specific than the name alone. It does not, however, distinguish this tool from the many sibling slide-builders (canva_add_card_comparison, canva_add_swot_matrix, canva_add_split_architecture, canva_add_tasteful_slide), so an agent cannot tell from the text alone which layout tool this replaces.

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 explicit when-to-use or when-not-to-use guidance and no named alternative, even though the sibling list contains at least four other 'add slide' tools. The 2-6 member constraint implies the intended scenario (team/people slides) but that is inference rather than stated routing guidance.

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