cache_entries_for_date

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

No annotations exist, so the description must fully convey behavior. It mentions fetching (network) and saving (local write), but lacks crucial details like whether the cache is overwritten or appended, if authentication is required, or if the operation is idempotent. This is insufficient for safe invocation.

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 sentence with 11 words, which is concise and front-loaded with the action ('Fetch'). However, it is under-specified for the tool's complexity, slightly detracting from conciseness.

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?

Given the tool has 2 parameters, no annotations, and an output schema, the description should elaborate on parameter format, caching behavior (e.g., overwrite vs append), and error conditions. It only provides a high-level action, leaving many operational details unspecified.

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%, yet the description only hints at the 'date' parameter ('one date') and completely ignores the optional 'journal' parameter. It does not clarify date format or parameter purpose, failing to compensate for the missing schema descriptions.

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 verb ('Fetch and save'), the resource ('LiveJournal entries'), the scope ('one date'), and the destination ('local SQLite cache'). This distinguishes it from siblings like 'get_entries_for_date' which likely fetches without caching.

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?

No guidance is provided on when to use this tool versus alternatives like 'get_entries_for_date' or 'cache_recent_entries'. The description only states what the tool does, not when it's appropriate.

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