When I measure a person at 6' and thirty years later the person is measured at 5'11", would you say that the tape measure dilated?

Of course not.

A tool is always a tool. If it were to change, it would be a worthless tool.

The Cesium clock sent into space?

Showed that not even a Cesium clock is all that stable when placed in a distinct spatial location.

Subject matter:

The person shrinking

Subject matter:

The clock changing behavior

Tool:

Tape Measure

Tool:

Time Measure