system_apks_variants_create

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

No annotations exist, so the description carries full burden. It only states 'create' without noting whether the operation is idempotent, what permissions are needed, or any side effects. For a mutation tool, more behavioral context is expected.

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?

The description is a single sentence, making it very concise. However, given the complexity of the variant parameter and no additional context, it is overly terse and sacrifices clarity.

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 no annotations, no output schema, low schema coverage, and a complex nested parameter, the description fails to provide enough information for correct selection and invocation. Important aspects like variant structure and expected response are missing.

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?

The schema has 3 parameters with only 33% description coverage (packageName described). versionCode lacks description, and variant is an object with additionalProperties (arbitrary keys). The description does not clarify the structure or constraints of variant, nor the format of versionCode, leaving significant ambiguity.

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 clearly states the action 'create' and the resource 'system APK variant', and specifically mentions association with 'versionCode'. It distinguishes itself from sibling tools like system_apks_variants_download or system_apks_variants_list by focusing on creation.

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?

No guidance is provided on when to use this tool versus alternatives, prerequisites, or typical workflow steps. The tool name implies a variant management flow, but context is missing.

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