vk_list_sections

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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds a useful behavioral detail — that each section is returned with an endpoint count — but says nothing about ordering, pagination, scope, or authentication needs, which for a discovery tool would be worth mentioning.

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 clause with zero waste, front-loading the verb and resource and appending the one piece of return-shape context that matters. Nothing could be cut without losing information.

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?

A no-argument read tool with an output schema, so return values need not be described. The description is sufficient to invoke correctly, though it omits how this sections list relates to the sibling vk_get_section and vk_search_methods in the discovery workflow.

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 tool takes zero parameters and schema coverage is 100%, so there is nothing for the description to disambiguate. Baseline 4 applies; no parameter-level claims are made or needed.

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 specific verb and resource ('List API sections') plus the payload ('how many catalog endpoints each contains'), which is more informative than the bare tool name. It does not, however, differentiate itself from the closely named sibling vk_get_section or explain the catalog/section model, so an agent must infer the relationship.

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 when-to-use guidance, no prerequisites, and no mention of alternatives such as vk_get_section for drilling into a single section or vk_search_methods for finding endpoints. The agent is left to infer the intended first-step role of this tool.

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