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

Annotations already mark readOnlyHint=false, so the description's 'rename' and 'move' verbs are consistent. It adds useful context by stating 'metadata only' and explaining that a unique folder name resolves to its ID, which goes beyond the schema and annotations.

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, dense sentence that front-loads the core action (rename/move) and includes the critical metadata-only caveat. Every clause earns its place with no wasted words.

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 rename/move tool with three parameters and one required, the description covers the main behaviors and the folder resolution nuance. It doesn't mention return values or error handling, but those are not essential given the tool's simplicity and the lack of an output schema.

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% and each parameter has a clear description. The tool description reinforces the folder name resolution behavior but doesn't add meaning beyond what the schema already provides for the parameters themselves, so the baseline of 3 applies.

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 renames a journal entry or moves it to another folder, and explicitly scopes it to metadata only, distinguishing it from journal-page-update. It names the sibling for page edits, making its purpose 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?

It provides clear when-to-use guidance by specifying rename/move operations and pointing to journal-page-update as the alternative for page content. It doesn't explicitly list exclusions, but the reference to the sibling tool is sufficient for an agent to choose correctly.

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