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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds value beyond that by disclosing the return payload — the datastore record together with its files and statistics — which matters because no output schema exists. It stops short of saying whether the embedded files are a full listing or a summary, which would be the remaining useful detail.

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?

A single sentence, front-loaded with the verb and resource, with the return scope appended. Every element earns its place and there is no filler.

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 one-parameter read tool with rich annotations and full schema coverage, the description supplies what is missing from structured fields — namely the shape of the response (record, files, statistics). The only gap is the absence of any routing context against the numerous sibling retrieval tools, which for this tool family is a real ambiguity.

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?

There is a single required parameter with 100% schema description coverage ("The datastore ID"), so the schema already carries the burden and baseline 3 applies. The description only restates "by ID" and adds nothing about ID format, where to obtain one, or validation behavior.

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 verb and resource ("Get a Business Context datastore") plus the lookup key ("by ID") and the payload ("with its files and statistics"), which is far more informative than the tool name alone. It does not, however, distinguish itself from overlapping siblings such as datastore_get_files or datastore_list, leaving the agent to infer why "with its files" differs from the dedicated files tool.

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 explicit when-to-use or when-not guidance, and none of the adjacent tools (datastore_list, datastore_get_files, datastore_get_document, datastore_get_chunks, datastore_query, datastore_discover) are referenced. Only a weak implication exists that the caller already has a datastore ID obtained elsewhere, which is not stated.

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