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

Annotations already declare readOnly=false, idempotent=true, destructive=false, and openWorld=false, so safety is covered. The description adds some context ('report_outcome ... after acting' implies a post-action write; 'check ... deprecated/retired flags' hints at a read), but it does not disclose side effects, permissions, or what state each op changes.

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 dense but appropriately sized for 18 operations, and it front-loads the call pattern. However, it is a single run-on semicolon list mixing op names, argument hints, and terse glosses, which hurts scanability.

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 18-op multiplexer with no output schema, the description covers the op menu and some argument names but says nothing about return values, error behavior, or domain context. The 'op=help' escape hatch helps, but an agent still lacks enough information to invoke many ops 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%: op is an undescribed enum and args is an untyped object. The description is the only source of argument names and maps most ops to expected args (e.g., quote(jtbd), estimate(jtbd, workload), audit_repo(packages, models)), which is substantial compensation. It still omits types, requiredness, and detailed meaning for several no-arg ops.

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 enumerates many specific operations (quote, estimate, audit_repo, etc.), so concrete actions are visible. But it never states what 'depot' is or the overarching task beyond 'drill-down', and it does not distinguish itself from siblings decide/rescue/session_brief. Purpose is inferable but not clearly stated.

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?

Only invocation mechanics are given ('One op per call', 'after acting', 'op=help lists args'). There is no when-to-use/when-not guidance, no alternative routing to decide/rescue/session_brief, and no prerequisite context. The agent must guess which op fits a given situation.

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