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chrischall

simplisafe-mcp

by chrischall

simplisafe_set_lock_state

Idempotent

Lock or unlock a SimpliSafe smart lock. Confirmation is required to execute the action; without confirmation, a dry-run preview is returned.

Instructions

Lock or unlock a SimpliSafe smart lock. CONFIRM-GATED — without confirm: true nothing is sent and you get a dry-run preview. Unlocking physically opens a door lock, so it is gated even though it is technically reversible. After executing, the result is verified by re-reading the lock state.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sidNoSystem id. Optional when the account has exactly one system; required when it has several.
stateYesTarget: lock or unlock.
serialYesLock serial, from simplisafe_list_locks.
confirmNoMust be true to proceed. Without this, the tool returns a preview.
Behavior5/5

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

The description adds significant behavioral context beyond annotations: confirm-gating, dry-run preview, physical unlocking safety, and verification by re-reading. Annotations already indicate non-readOnly, openWorld, idempotent; description enriches this with concrete safety and execution details.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three well-structured sentences: purpose, confirm-gated mechanism, and additional safety/verification. No wasted words; every sentence adds essential information.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Covers purpose, confirm gating, physical safety, and verification. Lacks explicit mention of return values or error conditions, but given no output schema, the description is fairly complete for this mutation tool.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so baseline is 3. The description adds meaning for 'confirm' (must be true to proceed, else preview) and 'serial' (source from simplisafe_list_locks), which goes beyond the schema. For 'state' and 'sid', schema is sufficient; overall adds value.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the verb (lock/unlock) and resource (SimpliSafe smart lock), distinguishing it from sibling tools like simplisafe_set_alarm_state and simplisafe_list_locks.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explains the confirm-gated behavior and the dry-run preview, but does not explicitly guide when to use this tool vs alternatives. It implies usage for lock state changes but lacks when-not or explicit alternatives.

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

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