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

Annotations already declare readOnly/idempotent/non-destructive, and the description adds genuinely new context: results are paginated ('one page'), secrets are redacted (no values, ciphertext or fingerprints), and only current state is covered, not historical deployments. It still omits any note on permissions or how to advance pages.

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?

Four short sentences, front-loaded with the core action and scope, with exclusions following. Minor redundancy in the trailing 'Names are user-defined text', which adds little beyond noting there is no naming convention.

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?

No output schema exists, so the description must describe the return shape; it does so only partially (names plus unspecified 'metadata', values redacted) and says nothing about response envelope or cursor advancement. Adequate to call the tool safely, but not sufficient for an agent to handle pagination confidently.

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 0%, so the description must compensate for projectId, limit and cursor. It only hints at pagination via 'one page' and at authorization via 'permitted project'; it never explains the limit cap of 100 or the meaning/format of the opaque cursor, leaving the two optional parameters effectively undocumented.

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 ('List one page of current environment variable names and metadata') and bounds the return set by excluding values, ciphertext and fingerprints. It is clearly distinguishable from the mutation siblings set_env/unset_env, though it never names them or another read tool for comparison.

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 sentence 'This does not show the configuration of a historical deployment' implies a when-not condition, but it does not name the alternative tool (e.g. get_deployment) or spell out when an agent should prefer this listing. Usage is inferable rather than instructed.

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