snapshot_changelog

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

No annotations are present, so the description carries the full burden of behavioral disclosure. It does not state whether this is a read-only operation, whether it requires existing local snapshots, what happens if none exist, or whether any state is modified. The description adds source scope but not behavioral expectations.

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 main purpose is front-loaded, but the description becomes a long run-on sentence with an appended 'Snapshot guide' list that is not cleanly separated or punctuated. It is information-dense but structurally cluttered.

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?

The core action and source are stated, and the input schema fully covers parameters. However, with no annotations and no output schema, the description leaves behavioral context and selection guidance mostly implicit, making this adequate but not fully self-contained.

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%, so the parameter descriptions already document playlist, max_results, and response_format. The tool description adds no parameter-level meaning beyond what the schema provides, landing at the baseline 3.

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 names a specific action (Build), a precise resource (chronological changelog of a playlist), and the data source (every local snapshot). It also clarifies that changes are described between consecutive snapshots, which distinguishes this tool from playlist_changelog and one-off diff tools.

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?

The appended 'Snapshot guide' names related create/list/read/diff/restore tools and implies how snapshot_changelog fits into the snapshot lifecycle, but it never states when to choose this tool over alternatives. There is no explicit condition such as 'use this for a full history instead of diffing a single pair.'

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