lazy_add_intersection

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

No annotations are provided, so the description carries the full burden of behavioral disclosure, yet it reveals nothing about side effects. 'Add' implies the tool mutates a project, but there is no mention of whether files are modified or generated, whether dependencies are installed, whether an existing setup is required, or whether the api_key is consumed. An agent cannot predict the consequences of invoking this tool.

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 short sentence with zero filler words and the verb front-loaded. However, this is borderline under-specification rather than genuine conciseness, since the phrase conveys little more than the tool name and omits material detail.

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?

For a tool with no annotations, no output schema, and a required parameter (api_key) left undocumented by both schema and description, this is incomplete. An agent has no way to know what 'adding' entails, what happens inside the target directory, or how this integrates with the broader lazy-loading tool family.

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 only 50%: directory is documented as 'Project directory' but api_key has no schema description. The tool description itself adds no parameter context, leaving unclear why an Intersection Observer task would need an api_key, and whether directory should point to the project root or a source subdirectory.

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 ('Add') and resource ('intersection observer loading'), which identifies this as a tool that introduces lazy loading via the IntersectionObserver API. However, it doesn't clarify what is being loaded (images, components, iframes), what files are affected, or how the agent should distinguish it from family siblings like lazy_generate_patterns and lazy_optimize_priority. The phrase barely expands on the tool name.

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 given about when to use this tool versus alternatives. The sibling list contains closely related tools in the lazy_ family, but the description offers no conditions, prerequisites, or routing hints, so an agent cannot determine whether this tool or a sibling is the right choice for a given request.

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