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

Annotations declare readOnlyHint=false, destructiveHint=false, openWorldHint=false, covering the safety profile. The description adds no behavioral context beyond that (no mention of mutation effects, placement side effects, or auth needs), so it does not exceed the annotated baseline.

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?

Three short sentences, front-loaded with the action, then variant guidance and a compact example. Little waste; the "native string array" note is slightly redundant with the schema type declaration.

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?

With 100% schema description coverage and no output schema, the description covers what the schema does not (variant meaning, example). Placement semantics (`after`/`position`/`parentId`) live in the schema and are not echoed, which is acceptable given full coverage.

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 coverage is 100%, so the baseline is 3, but the description meaningfully expands the terse schema enum for `variant` ("ordered" = numbered, "unordered" = bullets) and clarifies `items` is a native string array with a concrete example.

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?

States a specific verb+resource ("Insert a list element") and clarifies the two variants. It does not explicitly distinguish itself from the many sibling insert tools (insertParagraph, insertRadioQuestion, etc.), so an agent must infer the list-vs-other-element choice.

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 explains how to drive the `variant` enum but gives no explicit when-to-use guidance, prerequisites, or alternatives among the large family of editor_insert* tools. Usage is only implied by the word "list".

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