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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, so the safety profile is known. The description adds value by warning 'Getting it wrong fails at runtime, not at compile time' and explaining that the result depends on the components passed. This goes beyond the annotations without contradicting them.

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 two sentences with zero waste. It front-loads the core purpose ('The exact app-root provider nesting these components require'), then adds a crucial warning and a usage instruction. Every sentence earns its place, and the structure is clear and efficient.

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 simple tool with one optional parameter and no output schema, the description covers purpose, usage, and a behavioral warning. It doesn't describe the return format or error conditions, but given the tool's simplicity and the strong annotations, this is sufficient for an agent to use it correctly.

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 coverage is 100% because the parameter 'components' has a description: 'optional slugs in use.' The description reinforces this by saying 'Pass the components in use,' and clarifies that these are slugs identifying which providers are needed. This adds meaning beyond the schema's minimal description, so a 4 is appropriate.

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 tool returns 'the exact app-root provider nesting these components require, in the order that works.' This is specific about the resource (provider tree) and the action (get). It distinguishes from siblings like get_component or get_rules by focusing on provider nesting, so an agent can tell it apart without opening the schema.

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?

It says to 'Pass the components in use to see which providers each one needs,' which gives clear usage context and indicates the tool is for when you have components and need the provider tree. However, it does not explicitly mention when NOT to use it or name alternative tools, so it lacks explicit exclusions.

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