read_playlist_snapshot

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

With no annotations, the description carries the burden and it does disclose the core behavior: it reads a local snapshot, returns meta + captured track rows, and truncates based on max_results. It stops short of stating explicit side-effect-freeness or error behavior, though 'Read' strongly implies no mutation.

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 core behavior is front-loaded and the snapshot guide is compact but useful. The sentence is slightly run-on and repeats the tool name in the guide, but every part contributes.

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 3-parameter local read tool with no output schema, the description gives enough to call it correctly: what it reads, what it returns, truncation, response formats, and sibling routing. It leaves 'meta' somewhat unspecified and does not discuss missing-snapshot errors, but those are minor for a simple read.

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 coverage is 100%, so the schema already documents snapshot, max_results, and response_format fully. The description adds little beyond tying max_results to truncation; baseline 3 applies because the schema does the heavy lifting.

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?

Description uses a specific verb and resource ('Read one local playlist snapshot') and states the returned content ('meta plus the captured track rows (truncated by max_results)'). The trailing snapshot guide names sibling tools by role, distinguishing read from create/list/diff/restore.

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 snapshot guide explicitly maps each operation to its tool: take_playlist_snapshot (create), list_saved_snapshots (list), read_playlist_snapshot (read), diff_playlist_snapshots/snapshot_new_tracks/snapshot_removed_tracks (diff), restore_playlist_from_snapshot/restore_playlist_plan (restore). This tells an agent when this tool is the right choice and names alternatives.

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