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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds genuine behavioral context by explaining that the returned urls open the sound-card folder or the player for listening/trimming/combining, which tells the agent what actions the response enables. It says nothing about authorization, limits, or behavior when the entity is missing.

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 entire description is a single run-on sentence with deeply nested parentheticals about urls, making it hard to parse. The actionable part ('by id') is buried at the front while most of the text is back-loaded return-value detail that the output schema already covers.

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?

An output schema exists, so the extensive narration of image/events/variations/pages is largely redundant, while the one thing missing, the meaning of include_image, goes unaddressed. For a two-parameter read tool this leaves a real gap.

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 bears full responsibility. It only implies entity_id via 'by id' and glancingly mentions 'image' without ever explaining include_image (a boolean defaulting to true), leaving one of two parameters semantically undocumented.

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 opening clause 'Full details of an entity by id' gives a clear verb-plus-resource, and the enumeration of image, events, variations and pages establishes scope. It does not, however, explicitly distinguish this from siblings like create_entity or get_manifest, leaving the agent to infer that this is the read-only detail fetch.

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?

There is no when-to-use or when-not-to-use guidance and no alternative tool is named. What exists is a description of what the returned URLs do (open folder, open player), which is return-value narration rather than invocation guidance.

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