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

The description discloses behavioral nuances beyond annotations: create generates a keypair and returns a public key for SFTP; for AWS S3 it returns a trustPolicy and dpfPrincipalId. It also clarifies that both types must pass test before a trigger can work. This is substantial behavioral disclosure not present in annotations (which only say destructive=true). No contradiction.

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 description is longer but information-dense. It packs a lot: two types, four actions, setup prerequisites, and alternative tool. The structure is logical (overview, type-specific flows, usage rule). Could be slightly tightened but the length is justified by complexity. Front-loaded with the core action list.

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 complex tool with two types and multi-step setup, this description covers: the actions, per-type requirements, the test gate, and the recommended alternative tool (setup_scheduled_pull). It even explains what the create action returns (public key, trustPolicy) which is critical. An output schema exists, so return formats are elsewhere covered. Very complete.

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 covers 100% of params with descriptions, so baseline is 3. The description adds contextual meaning: roleArn is aws_s3 only, hostname/username are sftp only, connectionId needed for test/delete, workspaceId defaults to sole workspace. This clarifies which params apply to which action/type, which the schema does not. Solid upgrade over 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?

The description clearly states the tool creates, lists, tests, or deletes workspace connections, explicitly names the two supported types (sftp, aws_s3), and distinguishes itself from the sibling tool setup_scheduled_pull by advising to prefer that tool for first-time scheduled pulls.

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 description explicitly explains when to use this tool versus setup_scheduled_pull, and provides per-type setup steps (install public key for SFTP, update IAM role for S3) and the test-before-use requirement. It also says what's required for each action (create requires certain fields, test/delete require connectionId).

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