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

Annotations already cover read-only, idempotent, non-destructive behavior, so the bar is low, yet the description still adds real value: the built-in per-tier defaults (0.6/0.8/1.0/1.4) and the interpretation of values below/above 1. It omits auth or rate-limit notes but contributes substantive domain context beyond the structured fields.

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?

Two sentences, front-loaded with the operation and followed by the interpretive context an agent actually needs. No filler or restated structured fields.

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?

With no output schema, the description compensates by explaining what a returned modifier means and what absence of an override implies. For a single-param read tool this is nearly complete; it could state more about the return shape, but the domain semantics cover the main ambiguity.

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 100% and there is only one parameter (id, UUID, 'Criticality modifier ID'), so the schema already does the explaining. The description's 'by ID' adds nothing syntactic beyond it; baseline 3 is appropriate.

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 (Get) and resource (criticality modifier override) with the scoping qualifier 'single ... by ID', which implicitly distinguishes it from list_criticality_modifiers. It does not explicitly name sibling tools, so it stops just short of a top score.

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 explains domain semantics (defaults, tightening vs relaxing) but never says when to reach for this tool versus list_criticality_modifiers or update_criticality_modifier. No alternatives or preconditions are given, leaving routing to inference.

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