cache_entry

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

No annotations are provided, so the description must fully disclose behavior. It mentions fetching (network request) and saving to cache (write), but does not disclose whether existing cache entries are overwritten, any authentication needs, or rate limits. The behavior is partially transparent but lacks important side-effect details.

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?

A single, concise sentence with no extraneous words. It efficiently conveys the core 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?

While the tool is simple with 2 parameters, the description lacks context about caching behavior (e.g., overwrite policy, where cache is stored). An output schema exists but the description does not allude to return values. Adequate but not rich enough for the tool's ecosystem.

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%, so the description must explain parameters. It only references 'itemid' implicitly, but does not explain 'journal' at all, leaving its purpose unclear. No additional semantics beyond the schema.

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 it fetches an entry by itemid and saves to cache, with a specific verb ('Fetch and save') and resource ('LiveJournal entry'). It distinguishes from siblings like 'get_cached_entry' and 'list_entries' by mentioning caching behavior.

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 on when to use this tool versus alternatives. With 17 sibling tools, the description fails to indicate context, prerequisites, or when to prefer this over, say, 'get_entry' or 'get_cached_entry'.

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