create_cluster_snapshot

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

With no annotations, the description carries the full burden; it does disclose two meaningful traits beyond the schema — the snapshot is immutable and creation is immediate (not deferred). It does not disclose whether clustering is expensive/long-running (the presence of get_job_status suggests possible async behavior), what permissions are required, or whether repeated calls with the same level create duplicates.

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 front-loaded sentence that names the operation and the persistence behavior with no filler. Every clause earns its place.

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 write tool with no annotations and no output schema, the definition explains what is produced conceptually but not how the created snapshot is identified afterward, whether the call is synchronous, or how it relates to list_cluster_snapshots/get_cluster_snapshot for verification. Adequate but with clear gaps.

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 100%, so all four parameters including the level range, target_type enum, and full_coverage flag are already documented in the schema. The description adds only the conceptual link that 'connected-components clustering' is what level granularity controls, which is a marginal gain.

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?

States a specific verb and resource: 'Compute connected-components clustering' plus the additional action 'freeze it immediately into an immutable database snapshot'. This distinguishes it from a pure compute operation and from the reporting siblings, though it never names compute_clusters or create_cluster_report explicitly as the non-persisting alternatives.

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 word 'immediately' and 'immutable' imply this is the persist-now variant, so the when-to-use is inferable, but there is no explicit statement of when to prefer compute_clusters or create_cluster_report instead, and no prerequisites or exclusions are given.

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