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

Annotations already declare readOnlyHint=false and destructiveHint=false, so the write-but-safe profile is covered. The description adds the useful context that it is a simulation and low-cost, but says nothing about session lifetime, follow-up tools (get_sdac_session/end_sdac_session), or what comes back.

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 tight sentences, purpose front-loaded, and the rationale sentence earns its place by conveying cost/risk context. No filler.

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 one-optional-parameter session creator with no output schema, the description conveys enough to call it correctly and understand why. It is slightly incomplete on session lifecycle and its relationship to the sibling session-creation and session-retrieval 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 optional auth_token whose schema description is fully documented (100% coverage). The description adds no parameter detail, so the baseline of 3 applies since the schema carries the load.

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 ('Start') and resource ('simulation session'), and the second sentence clarifies intent ('Test EE combinations'). However, it never distinguishes this session from the sibling create_ise_session, which also creates a session, so the agent must guess which creator to use.

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 phrase 'before creating real decisions' implies sequencing relative to create_decision and gives a soft reason to prefer this tool for experimentation. It stops short of naming an alternative or stating when NOT to start a simulation session.

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