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

No annotations are provided, so the description carries the full burden. It usefully discloses that this returns the complete stored record including the full summary (vs truncated output elsewhere), but says nothing about permissions, behavior for unknown ids, or what the record contains beyond the summary.

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?

One sentence, front-loaded with the object of the operation and no filler. It is terse to the point of being slightly clipped ('including the full summary' hints at a distinction from siblings without stating it), but nothing is 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?

For a simple read-by-id tool with one parameter and no output schema, the description covers the essentials but leaves the return shape and failure modes unstated. Adequate minimum for the complexity, not more.

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 0% and the single parameter has no description, so the schema only tells the agent it is a string. The description partially compensates by specifying the id must be one previously returned by the other tools, which is the one semantic detail that matters here.

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?

Names a specific verb+resource: fetch the full stored record for one change id, and notes it includes the 'full summary'. That distinguishes it from list_sources/recent_changes/search_changes, which evidently return abbreviated records, though no sibling is named explicitly.

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 parenthetical '(as returned by the other tools)' tells the agent where a valid change_id comes from, which is real usage context. There is no explicit statement of when to prefer this over search_changes or recent_changes, and no error/prerequisite guidance.

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