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

Annotations already declare readOnlyHint=true, destructiveHint=false and a closed-world scope, so the safety profile is covered by structured data. The description adds value by naming the returned content, which matters since there is no output schema, but it says nothing about failure modes or access constraints.

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?

A single front-loaded sentence with no filler; the retrieval scope and returned fields lead the statement. Slightly terse for the amount of information an agent needs, but nothing is waste.

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 simple two-parameter read tool with no output schema, the field enumeration is the most useful part and it is present. However, with no annotations for parameters and no output schema, the description leaves the identity/scope of both required IDs unstated.

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 neither of the two required parameters (projectId, leadId) is documented anywhere. The description could have clarified that the lead is scoped by project, but contributes nothing about parameter meaning or format.

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 ('Read one lead') and enumerates the key response contents (score, evidence quote, reason, stage, link). The word 'one' distinguishes it from the plural list_leads and the aggregate get_leads_overview, though it never names those siblings explicitly.

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?

Provides no when-to-use guidance, prerequisites, or alternatives. An agent must infer from the singular noun that this is an ID-based lookup as opposed to list_leads or get_leads_overview, and nothing states which project/lead scope is required.

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