Get Checkin Detail

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

No annotations are provided, so the description carries the full behavioral burden, yet it only describes response content (comments, photos, overlaps). It says nothing about read-only nature, required permissions, or any side effects. The content note is also largely redundant given an output schema exists.

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 tight sentence with the core action front-loaded and a compact parenthetical covering the returned contents. Nothing is padded or wasted.

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?

Parameters are fully documented and an output schema covers return values, so the tool is callable. However, with no annotations and no sibling routing, the definition omits the behavioral and usage context an agent would want for a by-ID retrieval tool.

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 100%, with both username and checkin_id documented in the schema, including the origin of checkin_id. The description adds no format, syntax, or semantic detail beyond the schema, so the baseline 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?

Specific verb ('Get') and resource ('full detail for a single checkin by ID'), which cleanly separates it from list-style siblings like get_user_checkins and search_all_users_checkins. It does not explicitly name those siblings, but 'single checkin' vs. multiple-checkin tools is clear.

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?

Usage is only implied: the agent infers you call this after obtaining a checkin_id. There is no explicit when-to-use, when-not-to-use, or alternative named in the description. The pointer to the source of the ID lives in the schema, not the description.

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