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

Annotations already declare readOnlyHint=true, non-destructive, and closed-world, so the safety profile is covered. The description adds useful context on where the required id comes from (the last part of the link) but says nothing about what the returned code contains or how large it may be.

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?

Two short sentences with the purpose front-loaded and the prerequisite immediately after. Nothing is wasted, though 'somebody's' is informal where a precise scope word would be tighter.

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 single-parameter, read-only tool with no output schema, the definition covers purpose plus how to obtain the id. The only gap is that it does not characterize the returned code, which the agent must discover on its own.

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% and the schema already states 'The share's id — the last part of the link'. The description repeats that same phrasing, adding no syntax, format, or validation detail 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?

Clear verb+resource: 'read somebody's vibescape', reinforced by the title 'Get a vibescape's code'. It distinguishes the read operation from siblings like create_vibescape, list_vibescapes, and share_vibescape, though it never explicitly names an alternative.

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 phrase 'so it can be adapted or understood' implies the use case and gives a real prerequisite ('Needs the id'), but there is no explicit when-not guidance or routing to siblings such as get_palette or list_vibescapes, leaving selection partly to inference.

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