init_context

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

With no annotations, the description carries the burden of explaining what the tool does. It does disclose the primary side effects: creating a .contextkeeper folder and items.json file. However, it does not mention behavior in edge cases (e.g., if the directory already exists, whether files are overwritten, or whether parent directories are created), leaving some uncertainty.

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, concise sentence that delivers the essential purpose and specific artifacts without extraneous detail. It is well-structured and front-loaded with the action.

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 initialization tool with one optional parameter and no output schema, the description covers the key facts: what is created and where. It could mention return values or failure modes, but the tool's simplicity makes the description reasonably complete.

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 input schema already fully describes the 'path' parameter, including its default behavior, so the description adds little beyond what structured data provides. The baseline of 3 applies because schema coverage is 100%.

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 uses a specific verb ('Initialize') and names the exact resources created ('.contextkeeper' folder and 'items.json' file). This clearly distinguishes the tool from the sibling tools, which all operate on an existing context rather than creating one.

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 phrase 'Initialize a new ContextKeeper directory' clearly implies this tool is for setting up a fresh context directory, which is distinct from the alternative sibling tools. It doesn't explicitly state when not to use it, but the scope is clear from the word 'new'.

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