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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and open-world, so the safety profile is covered. The description adds genuine behavioral context beyond that: environment variable names are returned but values are never returned, which tells the agent what will and will not be visible and sets expectations about the output. It does not mention permissions or scoping (e.g., whether the site must belong to the caller's organization).

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?

One front-loaded sentence that leads with the summary ('Full configuration and metadata') and then enumerates the fields. No filler, no repetition of the title, and the parenthetical about env values is placed exactly where it matters.

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?

An output schema exists, so the field enumeration is somewhat redundant, but it usefully signals scope and the env-value exclusion. The only gap relative to a simple read tool is the absence of any guidance on sibling selection, which matters given the many get_site_* tools.

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, site_name, and schema description coverage is 100%, so the schema already carries the semantics. The description adds nothing about the identifier format (slug vs display name vs ID) or scoping, so the baseline of 3 applies.

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+resource ("Full configuration and metadata for a site") and enumerates the concrete contents: organization, deployed version, build commands, env var names, custom domain, cloud account, deployment times. That is far more informative than the title alone. However, it never distinguishes this from close siblings such as get_site_overview, get_site_status, or get_site_custom_domain, so an agent must guess which 'site info' tool to pick.

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?

Usage is only implied: the phrase "full configuration and metadata" suggests this is the comprehensive config lookup rather than the status/analytics/traffic siblings. There is no explicit when-to-use statement, no prerequisites, and no named alternative such as get_site_overview for a lighter summary.

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