create_vault

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

The description discloses that the tool both creates and registers the vault, and constrains its operation to the configured parent directory. This aligns with the openWorldHint=false annotation, which indicates limited scope. However, it does not cover permissions, failure modes, or reversibility. With the annotation providing a baseline, the description adds moderate context.

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, direct sentence that gets straight to the point. It avoids unnecessary words and is front-loaded with the action, making it highly concise and well-structured.

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?

With four parameters, zero schema descriptions, and no output schema, the description is insufficiently complete. It explains what the tool does but lacks critical details about how parameters affect behavior, the registration process, and return values. This falls well short of what an agent needs for reliable invocation.

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 0%, and the description provides no information about the parameters (name, readOnly, dateFormat, dailyDirectory). The agent cannot infer their meaning or expected values from the description alone. This is a critical gap for a 4-parameter tool.

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 creates and registers a new vault, with a specific scope ('under the configured Obsidian vault parent directory'). This distinguishes it from sibling tools like register_vault (which presumably only registers an existing vault) and create_note (which creates a note). The verb+resource+scope pattern is specific and unambiguous.

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 description implies this tool is for new vault creation, but it does not explicitly state when to use it versus alternatives such as register_vault for existing vaults. The usage context is clear enough to infer, but there is no explicit 'when not to use' or mention of alternatives, leaving room for ambiguity.

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