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

No annotations are provided, so the description carries the full burden. It does not disclose duplicate-keyword handling, required permissions, whether group_ids must already exist, or what happens when a keyword already exists in the project. Only a basic mutation is implied.

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 short sentences with the primary purpose front-loaded. The second sentence mostly restates what the schema already says about group_ids, but it is not bloated.

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?

This is a bulk mutation tool with no annotations. Although the schema is rich and an output schema exists, the description omits important behavioral context such as duplicate handling, validation of group IDs, side effects, and batch-size caveats that are only in the schema.

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 the baseline is 3. The description adds little beyond the schema: it repeats that each keyword can have a list of group IDs, which is already fully documented in 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?

States a specific verb and resource: "Массово добавить ключевые слова в проект" (bulk add keywords to a project). The scope is clear, but it does not distinguish itself from siblings like create_keyword_group, update_group_keywords, or delete_keywords.

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 word "массово" implies bulk usage, but there is no explicit guidance on when to use this tool instead of alternatives such as create_keyword_group or update_group_keywords. No prerequisites, exclusions, or error conditions are mentioned.

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