Manage service env vars

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

The description adds a useful behavioral note that list masks secrets unless showSecrets is set, which is beyond what annotations provide. However, it does not elaborate on permissions, reversibility, or side effects, and the annotations (readOnlyHint=false, destructiveHint=false) already indicate mutability, so the added value is modest.

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 a single, tightly packed sentence that lists actions and key usage notes without superfluous words. It is well-structured and front-loads the core purpose, earning every word.

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?

The description covers the action list but omits critical context such as output format, parameter details, authentication, error handling, and relationships to other resources. Given 9 parameters and no output schema, it lacks the richness needed for an AI agent to invoke it correctly in all scenarios.

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?

With only 33% schema description coverage, the description needed to compensate by explaining key parameters. It clarifies the purpose of envs (for bulk_update) and env_uuid (for delete), but leaves key, value, is_literal, is_preview, and showSecrets semantics unexplained, which is insufficient given the low coverage.

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 uses the specific verb 'Manage' with the resource 'environment variables for a service', clearly distinguishing it from sibling tools like applicationEnvs and databaseEnvs. It also enumerates all actions (list, create, update, bulk_update, delete), making the tool's scope unambiguous.

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 'for a service' provides clear context for when to use this tool, differentiating it from application or database env var tools. It also gives action-specific hints (e.g., 'bulk_update (pass envs array)', 'delete (needs env_uuid)') that guide usage, though it lacks explicit exclusions or alternative mentions.

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