cal_add_sync

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

With no annotations provided, the description carries the full burden of disclosing side effects, required credentials, file modifications, or external calls. It discloses none of these; the only implied behavior is that some vaguely defined 'sync functionality' gets added.

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 short and free of fluff, but this is under-specification rather than effective conciseness. A single vague sentence does not earn its place because it fails to add meaningful information beyond the tool name.

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 two parameters, no annotations, no output schema, and a large sibling set, this description is severely incomplete. An agent cannot determine what sync functionality is added, how the parameters are used, what the tool returns, or how it differs from related calendar tools.

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 schema describes only the directory parameter, and the description adds no meaning for either parameter. The api_key parameter has no schema description and is not explained in the tool description, leaving its purpose and requirements unclear.

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 'Add calendar sync functionality' almost exactly restates the tool name cal_add_sync and gives no concrete detail about what adding sync entails. It reads as a tautology rather than a useful explanation of behavior or scope.

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?

There is no guidance on when to use this tool versus related siblings such as cal_setup_api or cal_generate_ui. No context, prerequisites, or exclusions are provided, leaving the agent to guess the appropriate invocation.

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