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

With no annotations, the description carries the full disclosure burden for a mutation tool, and it discloses nothing: not whether existing links are destroyed, whether an empty keyword_ids list clears the group, what permissions are required, or whether the call is idempotent.

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 short sentence with no filler and the resource front-loaded. It is under-specified rather than bloated, so it scores well on conciseness even though it lacks content.

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?

An output schema exists, so return values need not be explained, but for a two-parameter mutation with zero annotation coverage the description should at minimum clarify replace-vs-append semantics and the effect of the minItems=0 constraint. Neither is addressed.

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 both parameters are documented in the schema itself. The description adds no meaning beyond that baseline, which is expected but not differentiating.

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 names a verb and a resource ('Обновить привязку ключевых слов к группе'), so the agent knows it mutates the keyword-to-group link. It is not tautological, but it is only a restatement of the tool name with no scope detail and no differentiation from siblings like create_keyword_group 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?

There is no indication of when to use this tool versus create_keyword_group, delete_keywords, or update_keywords_status. Crucially it never says whether this replaces the existing binding set or appends to it, which is the decision an agent actually needs to make.

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